WO2022041168A1 - 一种检测骨导听力设备状态的方法和系统 - Google Patents

一种检测骨导听力设备状态的方法和系统 Download PDF

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Publication number
WO2022041168A1
WO2022041168A1 PCT/CN2020/112328 CN2020112328W WO2022041168A1 WO 2022041168 A1 WO2022041168 A1 WO 2022041168A1 CN 2020112328 W CN2020112328 W CN 2020112328W WO 2022041168 A1 WO2022041168 A1 WO 2022041168A1
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WIPO (PCT)
Prior art keywords
transfer function
feedback path
path transfer
bone conduction
hearing device
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Ceased
Application number
PCT/CN2020/112328
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English (en)
French (fr)
Inventor
唐惠芳
李伯诚
闫冰岩
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Shenzhen Shokz Co Ltd
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Shenzhen Shokz Co Ltd
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Filing date
Publication date
Application filed by Shenzhen Shokz Co Ltd filed Critical Shenzhen Shokz Co Ltd
Priority to CN202080099657.1A priority Critical patent/CN115380541A/zh
Priority to BR112022021028-0A priority patent/BR112022021028B1/pt
Priority to JP2022568470A priority patent/JP7790731B2/ja
Priority to PCT/CN2020/112328 priority patent/WO2022041168A1/zh
Priority to EP20950837.3A priority patent/EP4117311A4/en
Priority to KR1020227039492A priority patent/KR20220166866A/ko
Publication of WO2022041168A1 publication Critical patent/WO2022041168A1/zh
Priority to US17/935,123 priority patent/US12160705B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/30—Monitoring or testing of hearing aids, e.g. functioning, settings, battery power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/30—Monitoring or testing of hearing aids, e.g. functioning, settings, battery power
    • H04R25/305—Self-monitoring or self-testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/13—Hearing devices using bone conduction transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]

Definitions

  • the present application relates to the technical field of hearing devices, and in particular, to a method and system for detecting the state of a bone conduction hearing device.
  • Hearing devices usually have both a microphone and a speaker, and the state of the hearing device has a great impact on the use of the hearing device.
  • the abnormal state of the hearing device may cause the output sensitivity of the hearing device to be greatly reduced or directly cause the hearing device to malfunction (eg, howling). Therefore, the detection of the state of the hearing device is of great significance for ensuring the normal use of the hearing device and reducing the possible damage caused by the abnormality of the hearing device.
  • the feedback path transfer function is an important indicator reflecting the state of the hearing device. In some scenarios, by detecting and evaluating the feedback path transfer function of the bone conduction hearing device, the real-time state of the bone conduction hearing device can be directly reflected.
  • One of the embodiments of the present application further provides a method for detecting the state of a bone conduction hearing device, wherein the bone conduction hearing device at least includes a microphone, a speaker, a feedback analysis unit, and a signal processing unit, and the method includes: using the speaker A third sound is generated based on the first signal; wherein the first signal is generated by the signal processing unit; the third sound is received by the microphone and a feedback signal is generated; the feedback analysis unit is based on the microphone's the feedback signal and the first signal, determine a feedback path transfer function from the speaker of the bone conduction hearing device to the microphone; obtain at least one preset feedback path transfer function; compare the feedback path transfer function with the at least one preset feedback path transfer function; the signal processing unit determines the state of the bone conduction hearing device according to the comparison result.
  • the at least one preset feedback path transfer function includes a standard feedback path transfer function and an abnormal feedback path transfer function; the abnormal feedback path transfer function includes an incorrect wearing feedback path transfer function, and an abnormal feedback on the structure of a bone conduction hearing device. one or more of a path transfer function, a foreign object intrusion feedback path transfer function, and a foreign object occlusion feedback path transfer function; the comparing the feedback path transfer function and the at least one preset feedback path transfer function includes: determining the difference between the feedback path transfer function and the feedback path transfer function.
  • the at least one preset feedback path transfer function whose path transfer function is within a preset threshold range; and the type of the feedback path transfer function is determined based on the type of the at least one preset feedback path transfer function.
  • determining the type of the feedback path transfer function based on the type of the at least one preset feedback path transfer function includes: if the type of the at least one preset feedback path transfer function is a standard feedback path transfer function , then determine that the type of the feedback path transfer function is normal; or if the type of the at least one preset feedback path transfer function is an abnormal feedback path transfer function, determine the abnormal type of the feedback path transfer function; further comprising: if If the type of the at least one preset feedback path transfer function is an incorrect wearing feedback path transfer function, then it is determined that the type of the feedback path transfer function is incorrect wearing; or if the type of the at least one preset feedback path transfer function is is the structural abnormality feedback path transfer function of the bone conduction hearing device, then it is determined that the type of the feedback path transfer function is the structural abnormality of the bone conduction hearing device; or if the type of the at least one preset feedback path transfer function is the foreign body invasion feedback path transfer If the type of the transfer function of the feedback path is the foreign object intrusion;
  • the determining the at least one preset feedback path transfer function that is within a preset threshold range with the feedback path transfer function includes: if the at least one preset feedback path transfer function includes at least two , the preset feedback path transfer function with the smallest difference is determined to be the preset feedback path transfer function.
  • the determining the state of the bone conduction hearing device according to the comparison result includes: if the type of the feedback path transfer function is normal, determining that the state of the bone conduction hearing device is normal; If the type of the feedback path transfer function is abnormal, it is determined that the state of the bone conduction hearing device is abnormal; it further includes determining the abnormal type of the bone conduction hearing device: if the type of the feedback path transfer function is incorrect wearing, then determine that the state of the bone conduction hearing device is incorrectly worn; or if the type of the feedback path transfer function is structural abnormality of the bone conduction hearing device, determine that the state of the bone conduction hearing device is structural abnormality; or if the If the type of the transfer function of the feedback path is foreign body invasion, the state of the bone conduction hearing device is determined to be foreign body invasion; or if the type of the feedback path transfer function is foreign body occlusion, the state of the bone conduction hearing device is determined to be foreign body occlude.
  • the method further includes: adaptively adjusting parameters of the bone conduction hearing device or sending reminder information to the user according to the state of the bone conduction hearing device.
  • the state of the bone conduction hearing device includes at least one of the following: a normal state, an abnormal state; the abnormal state includes one or more of incorrect wearing, abnormal structure of the bone conduction hearing device, foreign body invasion, and foreign body occlusion .
  • One of the embodiments of the present application further provides a system for detecting the state of a bone conduction hearing device, wherein the bone conduction hearing device at least includes a microphone, a speaker, a feedback analysis unit, and a signal processing unit, and the system includes: the speaker is configured to generate a third sound based on the first signal; wherein the first signal is generated by the signal processing unit; the microphone is configured to receive the third sound and generate a feedback signal; the feedback analysis unit is configured determining a feedback path transfer function from the speaker of the bone conduction hearing device to the microphone based on the feedback signal of the microphone and the first signal; acquiring at least one preset feedback path transfer function; comparing the feedback a path transfer function and the at least one preset feedback path transfer function; the signal processing unit is configured to determine the state of the bone conduction hearing device according to the comparison result.
  • the at least one preset feedback path transfer function includes a standard feedback path transfer function and an abnormal feedback path transfer function; the abnormal feedback path transfer function includes an incorrect wearing feedback path transfer function, and an abnormal feedback on the structure of a bone conduction hearing device. one or more of a path transfer function, a foreign object intrusion feedback path transfer function, and a foreign object occlusion feedback path transfer function; the comparing the feedback path transfer function and the at least one preset feedback path transfer function includes: determining the difference between the feedback path transfer function and the feedback path transfer function.
  • the at least one preset feedback path transfer function whose path transfer function is within a preset threshold range; and the type of the feedback path transfer function is determined based on the type of the at least one preset feedback path transfer function.
  • determining the type of the feedback path transfer function based on the type of the at least one preset feedback path transfer function includes: if the type of the at least one preset feedback path transfer function is a standard feedback path transfer function , then determine that the type of the feedback path transfer function is normal; or if the type of the at least one preset feedback path transfer function is an abnormal feedback path transfer function, determine the abnormal type of the feedback path transfer function; further comprising: if If the type of the at least one preset feedback path transfer function is an incorrect wearing feedback path transfer function, then it is determined that the type of the feedback path transfer function is incorrect wearing; or if the type of the at least one preset feedback path transfer function is is the structural abnormality feedback path transfer function of the bone conduction hearing device, then it is determined that the type of the feedback path transfer function is the structural abnormality of the bone conduction hearing device; or if the type of the at least one preset feedback path transfer function is the foreign body invasion feedback path transfer If the type of the transfer function of the feedback path is the foreign object intrusion;
  • the determining the at least one preset feedback path transfer function of the feedback path transfer function within a preset threshold range includes: if the at least one preset feedback path transfer function includes at least two, Then, the preset feedback path transfer function with the smallest difference is determined as the preset feedback path transfer function.
  • the determining the state of the bone conduction hearing device according to the comparison result includes: if the type of the feedback path transfer function is normal, determining that the state of the bone conduction hearing device is normal; If the type of the feedback path transfer function is abnormal, it is determined that the state of the bone conduction hearing device is abnormal; it further includes determining the abnormal type of the bone conduction hearing device: if the type of the feedback path transfer function is incorrect wearing, then determine that the state of the bone conduction hearing device is incorrectly worn; or if the type of the feedback path transfer function is structural abnormality of the bone conduction hearing device, determine that the state of the bone conduction hearing device is structural abnormality; or if the If the type of the transfer function of the feedback path is foreign body invasion, the state of the bone conduction hearing device is determined to be foreign body invasion; or if the type of the feedback path transfer function is foreign body occlusion, the state of the bone conduction hearing device is determined to be foreign body occlude.
  • the signal processing unit is configured to: adaptively adjust parameters of the bone conduction hearing device or send reminder information to the user according to the state of the bone conduction hearing device.
  • the state of the bone conduction hearing device includes at least one of the following: a normal state, an abnormal state; the abnormal state includes one or more of incorrect wearing, abnormal structure of the bone conduction hearing device, foreign body invasion, and foreign body occlusion .
  • One of the embodiments of the present application also provides a system for detecting the state of a bone conduction hearing device, wherein the system includes a sound generation module, a feedback signal generation module, a feedback analysis module and a signal processing module; wherein: the sound generation module, for generating a third sound based on the first signal; wherein, the first signal is generated by the signal processing unit; the feedback signal generating module is configured to receive the third sound and generate a feedback signal; the feedback analysis a module for determining, based on the feedback signal and the first signal, a feedback path transfer function from the speaker of the bone conduction hearing device to the microphone; acquiring at least one preset feedback path transfer function; and comparing the feedback path transfer function and the at least one preset feedback path transfer function; the signal processing module is configured to determine the state of the bone conduction hearing device according to the comparison result.
  • One of the embodiments of the present application further provides a computer-readable storage medium, where the storage medium stores computer instructions, and after the computer reads the computer instructions in the storage medium, the computer executes: generating based on the first signal a third sound; wherein the first signal is a test signal generated by the computer; receiving the third sound and generating a feedback signal; determining the bone conduction hearing device based on the feedback signal and the first signal the feedback path transfer function from the speaker to the microphone; obtain at least one preset feedback path transfer function; compare the feedback path transfer function with the at least one preset feedback path transfer function; according to the comparison result, determine the Status of bone conduction hearing devices.
  • FIG. 1 is a schematic diagram of an application scenario of a transfer function detection system according to some embodiments of the present application
  • FIG. 2 is an exemplary flowchart of a method for obtaining a vibration transfer function according to some embodiments of the present application
  • FIG. 3 is an exemplary block diagram of a system for obtaining a vibration transfer function according to some embodiments of the present application.
  • FIG. 4 is a schematic diagram of a transfer function detection system when the detector shown in some embodiments of the present application is in a first position
  • FIG. 5 is a schematic diagram of a transfer function detection system when the detector shown in some embodiments of the present application is in a second position;
  • FIG. 6 is a graph of the transfer function of the first feedback path according to some embodiments of the present application.
  • FIG. 7 is a graph showing the transfer function of the second feedback path according to some embodiments of the present application.
  • FIG. 9 is an exemplary flowchart of a method for detecting a state of a bone conduction hearing device according to some embodiments of the present application.
  • FIG. 10 is an exemplary block diagram of a system for detecting the status of a bone conduction hearing device according to some embodiments of the present application.
  • system means for distinguishing different components, elements, parts, sections or assemblies at different levels.
  • device means for separating components, elements, parts, sections or assemblies at different levels.
  • module means for separating components, elements, parts, sections or assemblies at different levels.
  • other words may be replaced by other expressions if they serve the same purpose.
  • bone conduction hearing device In the following, without loss of generality, when describing the bone conduction related technology in the present invention, "bone conduction hearing device”, “bone conduction hearing device”, “bone conduction speaker”, “speaker device” or “bone conduction earphone” will be used description of. This description is only a form of bone conduction application, and for those of ordinary skill in the art, “speaker” or “earphone” can also be replaced by other similar words, such as “player”, “hearing aid” and so on. In fact, the various implementations of the present invention can be easily applied to other non-speaker hearing devices.
  • a microphone such as a microphone can pick up the sound of the surrounding environment of the user/wearer, and under a certain algorithm, the sound is processed (or the generated electrical signal) and transmitted to the bone conduction speaker part.
  • the bone conduction speaker can be modified to add the function of picking up the ambient sound, and after a certain signal processing, the sound can be transmitted to the user/wearer through the bone conduction speaker part, so as to realize the function of the bone conduction hearing aid.
  • the algorithms mentioned here may include noise cancellation, automatic gain control, acoustic feedback suppression, wide dynamic range compression, active environment recognition, active anti-noise, directional processing, tinnitus processing, multi-channel wide dynamic range compression, active whistling One or more combinations of suppression, volume control, etc.
  • hearing devices typically have both a microphone and a speaker.
  • the sound from the speaker may be partially picked up by the microphone, causing howling, or causing the user (eg, the wearer) to hear an echo while using the device.
  • it is necessary to minimize the influence of the speaker on the microphone eg, remove the sound from the speaker from the signal received by the microphone.
  • the effect of the speaker on the microphone can be represented by the transfer function of the feedback path between the speaker and the microphone.
  • a bone conduction hearing device eg, a bone conduction hearing aid
  • the sound produced by the bone conduction speaker affects the microphone through both vibration and air conduction.
  • the feedback path from the bone conduction speaker to the microphone includes not only the air conduction transmission path, but also the vibration transmission path. These two transfer paths correspond to different transfer functions from the bone conduction speaker to the microphone. In some scenarios, it is necessary to better evaluate the impact of bone conduction speakers on microphones through different transmission paths, especially vibration transmission paths. For vibration transfer function measurement, additional devices such as accelerometers are usually required, and the test is more complicated.
  • some embodiments of the present application provide a method for obtaining the vibration transfer function of the bone conduction speaker to other positions (for example, the position where the microphone is located, which is connected to the bone conduction speaker through the casing), and uses the detectors at the first position respectively.
  • the vibration transfer function is calculated by receiving the first sound including the air conduction transmission path and the vibration transmission path and receiving the second sound including only the air conduction transmission path at the second position.
  • FIG. 1 is a schematic diagram of an application scenario of a transfer function detection system according to some embodiments of the present application.
  • the transfer function detection system 100 may be simply referred to as the system 100 .
  • System 100 may include detector 110 , hearing device 120 , database 130 and processor 140 .
  • the various components in the system 100 may be through including wireless connections, wired connections, or any other communications and/or connections that enable data transmission and/or reception, and/or any combination of these connections.
  • the system 100 can achieve the purpose of acquiring the vibration transfer function of the bone conduction hearing device and detecting the state of the bone conduction hearing device.
  • wired connections include, but are not limited to, the use of metallic cables, optical cables, or hybrid metallic and optical cables, such as: coaxial cables, communication cables, flexible cables, spiral cables, non-metallic sheathed cables, metallic sheathed cables leather cable, multiconductor cable, twisted pair cable, ribbon cable, shielded cable, telecommunication cable, twinax cable, parallel twin conductor, and twisted pair.
  • Wireless connections include, but are not limited to, radio communications, free space optical communications, acoustic communications, and electromagnetic induction, among others.
  • Radio communications include, but are not limited to, IEEE302.11 series standards, IEEE302.15 series standards (such as Bluetooth technology and Zigbee technology, etc.), first-generation mobile communication technologies, and second-generation mobile communication technologies (such as FDMA, TDMA, etc.) , SDMA, CDMA, and SSMA, etc.), general packet radio service technology, third-generation mobile communication technologies (eg, CDMA2000, WCDMA, TD-SCDMA, WiMAX, etc.), fourth-generation mobile communication technologies (eg, TD-LTE and FDD) - LTE, etc.), satellite communication (eg, GPS technology, etc.), near field communication (NFC), and other technologies operating in the ISM band (eg, 2.4GHz, etc.); free-space optical communications include but are not limited to visible light, infrared signals, etc.
  • Electromagnetic induction includes but is not limited to near field communication technology.
  • the examples described above are only for convenience of illustration, and the medium of wireless connection may also be other types, for example, Z-wave technology, other chargeable civil radio frequency bands and military radio frequency bands, and the like.
  • the hearing device 120 may generally include air conduction speakers and bone conduction speakers.
  • hearing device 120 may include a bone conduction speaker (eg, bone conduction speaker 122 as shown in FIGS. 4 and 5 ) and housing 121 .
  • the bone conduction speaker 122 and other components eg, microphone
  • the vibration transfer function of the bone conduction speaker 122 to a certain position of interest in the device (eg, as shown by 123 in Figures 1 and 4) needs to be calculated.
  • a certain position of interest may be the placement position of a certain microphone (eg, the microphone actually installed on the hearing device 120 ), or may be any place inside or outside the hearing device 120 (eg, the hearing device 120 ). Any part of the 120 that is rigidly or elastically connected to the bone conduction speaker 122).
  • the detector 110 may receive sound from the bone conduction speaker 122 and may then generate a feedback signal based on the sound.
  • the feedback signal may reflect the effect of the bone conduction speaker 122 on the detector 110 (where it is located).
  • the feedback signal can be sent to the processor 140, and the processor 140 can calculate the feedback path transfer function from the bone conduction speaker 122 to the detector 110 according to the feedback signal.
  • the detector 110 may also receive sound in the environment and generate an acoustic signal based on the sound. Sounds in the environment may include, for example, human voices, vehicle sounds, ambient noise, and the like.
  • the detector 110 may send the tone signal to the bone conduction speaker 122 and the processor 140, and the bone conduction speaker 122 may generate sound based on the tone signal.
  • the detector 110 may send the tone signal to the processor 140, and the processor 140 may transmit the tone signal to the bone conduction speaker 122, and the bone conduction speaker 122 may generate sound based on the tone signal.
  • detector 110 may include an acousto-electric transducer, such as a microphone.
  • the microphones may include ribbon microphones, microelectromechanical systems (MEMS) microphones, dynamic microphones, piezoelectric microphones, condenser microphones, carbon microphones, analog microphones, digital microphones, etc., or any combination thereof.
  • MEMS microelectromechanical systems
  • the microphones may include omnidirectional microphones, unidirectional microphones, bidirectional microphones, cardioid microphones, etc., or any combination thereof.
  • the probe 110 may also include an air conduction microphone and a bone conduction microphone.
  • the present application describes the microphone as the detector 110 .
  • Processor 140 may process data and/or information obtained from detector 110 , bone conduction speaker 122 , database 130 , or other components of system 100 .
  • the processor 140 may process the electrical signal generated by the microphone picking up the sound emitted by the bone conduction speaker 122, and thereby calculate the feedback path transfer function from the bone conduction speaker 122 to the microphone.
  • the processor 140 may be a single server or a group of servers. Server groups can be centralized or distributed.
  • the processor 140 may be local or remote.
  • processor 140 may access information and/or data from detector 110 , bone conduction speaker 122 , and/or database 130 .
  • processor 140 may be directly connected to detector 110, bone conduction speaker 122, and/or database 130 to access information and/or data.
  • the processor 140 may include a test signal generation unit 141 and a feedback path calculation unit 142 (as shown in FIGS. 4 and 5 ).
  • the test signal generation unit 141 may transmit a test tone signal (eg, a first test tone signal) to the bone conduction speaker 122 and the feedback path calculation unit 142 .
  • the bone conduction speaker 122 may generate a sound (eg, a first sound) based on the test tone signal, and after receiving the sound from the bone conduction speaker 122, the detector 110 may generate a feedback signal (eg, a first feedback signal) based on the sound and send the sound.
  • the feedback signal is sent to the feedback path calculation unit 142 , and the feedback path calculation unit 142 can calculate the feedback path transfer function based on the test tone signal and the feedback signal output by the detector 110 .
  • the feedback path calculation unit 142 may determine the corresponding feedback path transfer function (ie, the first feedback path transfer function ), based on the feedback signal including only the air conduction transfer path and its corresponding test tone signal, the feedback path calculation unit 142 may determine the corresponding feedback path transfer function (ie, the second feedback path transfer function).
  • the feedback path calculation unit 142 may determine the vibration transfer function based on the two feedback path transfer functions determined previously.
  • the processor 140 may also include a feedback analysis unit and a signal processing unit. In some embodiments, the processor 140 may determine the feedback path transfer function from the bone conduction speaker 122 of the bone conduction hearing device to the detector 110 in real time based on the feedback signal of the detector 110 . The processor 140 may also compare the transfer function of the feedback path determined in real time with other preset transfer functions of the feedback path to determine the real-time state of the bone conduction hearing device.
  • Database 130 may store data, instructions, and/or any other information. For example, the above-mentioned first feedback path transfer function and the like.
  • database 130 may store data obtained from detector 110 , bone conduction speaker 122 , and/or processor 140 .
  • database 130 may store data and/or instructions that processor 140 executes or uses to accomplish the example methods described in this application.
  • database 130 may include mass storage, removable storage, volatile read-write memory, read-only memory (ROM), the like, or any combination thereof.
  • database 130 may be implemented on a cloud platform.
  • database 130 may be in communication with at least one other component in system 100 (eg, processor 140). At least one component in system 100 may access data stored in database 130 (eg, the first feedback path transfer function). In some embodiments, database 130 may be part of processor 140 .
  • FIG. 2 is an exemplary flowchart of a method for obtaining a vibration transfer function according to some embodiments of the present application.
  • method 200 may be performed by system 100 (eg, processor 140).
  • system 100 eg, processor 140
  • method 200 may be stored in a storage device (eg, database 130 ) in the form of programs or instructions, which may be implemented when system 100 (eg, processor 140 ) executes the program or instructions.
  • Step 210 the test signal generating unit 141 generates a first test tone signal and a second test tone signal.
  • step 210 may be performed by test tone generation module 310 .
  • the test signal generating unit 141 may be a signal source capable of generating and outputting electrical signals with certain characteristics.
  • the first test tone signal or the second test tone signal includes a white noise signal, a pure tone signal, a pulse signal, a narrowband noise, a narrowband warble tone, a modulated tone and/or a sweep tone signal.
  • a sound-generating device eg, bone conduction speaker 122
  • the sound-generating device may generate noise with the same energy density at all frequencies, ie, white noise.
  • the generating device receives the pure tone signal
  • the sound generating device can generate a single-tone sound, that is, a pure tone.
  • the generating device receives the sweeping tone signal the sounding device can generate a sound whose frequency continuously changes from high to low (or from low to high) in the same frequency band, that is, sweeping tone.
  • the first test tone signal and the second test tone signal are signals successively generated by the test signal generating unit 141 at different time points and used for testing the device under test respectively.
  • the first test tone signal and the second test tone signal may be exactly the same, that is, the type and frequency of the first test tone signal and the second test tone signal are the same.
  • the first test tone signal and the second test tone signal may be exactly the same frequency sweep signal.
  • the types of the first test tone signal and the second test tone signal may also be different.
  • the first test tone signal may be white noise
  • the second test tone signal may be pure tone.
  • the testing of the device under test under the first test tone signal and the testing of the device under test under the second test tone signal may be replaced by a one-time completion.
  • the test signal generating unit 141 may only generate one kind of test tone signal, for example, only the first test tone signal or the second test tone signal, which can also achieve the purpose of testing.
  • Step 220 the bone conduction speaker 122 generates the first sound and the second sound respectively based on the first test tone signal and the second test tone signal.
  • the first test tone signal and the second test tone signal can be transmitted to the bone conduction speaker 122 in the form of electrical signals, and the bone conduction speaker 122 can convert the electrical signals into the first sound and the second sound respectively.
  • the bone conduction speaker 122 may include a diaphragm and a transducer.
  • the transducer may be configured to generate vibrations, eg, by converting electrical signals corresponding to the first and second test tone signals into mechanical vibrations.
  • the transducer can drive the vibrating plate to vibrate.
  • the vibrating plate may be mechanically connected to and vibrate with the transducer.
  • the vibration plate can contact the user's skin, and transmit the vibration to the auditory nerve through human tissue and bone, so that the user can hear the sound.
  • the bone conduction speaker 122 may sequentially generate the first sound and the second sound based on the first test tone signal and the second test tone signal.
  • the first sound may be generated first
  • the second sound may be generated after the microphone receives the first sound and outputs the first feedback signal.
  • the second sound may be generated first
  • the first sound may be generated after the microphone receives the second sound and outputs the second feedback signal.
  • the first sound and the second sound may be sequentially produced by the same bone conduction speaker 122 at the same location on the same hearing device 120 .
  • the bone conduction speaker 122 may include two bone conduction speakers 122 with the same structure and material, and the two bone conduction speakers 122 sequentially generate the first sound and the second test tone signal based on the first test tone signal and the second test tone signal respectively second voice.
  • Step 230 the at least one detector outputs a first feedback signal after receiving the first sound at the first position, and outputs a second feedback signal after receiving the second sound at the second position.
  • At least one detector may receive the first sound and the second sound respectively and generate the first feedback signal and the second feedback signal based on the first sound and the second sound, and send the first feedback signal and the second feedback signal to the feedback path test device (eg, feedback path calculation unit 142).
  • the feedback path test device eg, feedback path calculation unit 142
  • At least one detector includes an air conduction microphone (eg, the microphone in FIG. 4 and FIG. 5 ).
  • the microphone at the first position can receive the first sound transmitted by the bone conduction speaker 122 in the first manner.
  • the bone conduction speaker 122 may be fixed on the hearing device 120 (ie, the bone conduction speaker 122 is rigidly or elastically connected to the hearing device 120), and the first position may be in close proximity to the hearing device 120 (eg, FIG. 1 or FIG. 4 ). another position of the middle housing 121).
  • the microphone is rigidly or elastically connected to the hearing device 120 .
  • the bone conduction speaker 122 will drive the hearing device 120 (the casing) to vibrate when the first sound is generated, and the vibration of the hearing device 120 will be transmitted to the microphone close to the hearing device 120 .
  • the first position may be a position against the housing 121 of the hearing device 120 .
  • the vibration direction of the housing 121 is parallel to the vibration direction of the diaphragm of the microphone, the vibration of the housing 121 will also cause the vibration of the diaphragm of the microphone.
  • the bone conduction speaker 122 when the bone conduction speaker 122 generates the first sound, the vibration of the surrounding air will also be driven, and the vibration of the air will be transmitted to the microphone in the manner of air conduction. Therefore, the first sound is transmitted to the microphone by both vibration conduction and air conduction. That is, the above-mentioned first method includes vibration conduction and air conduction.
  • the microphone may generate a first feedback signal based on the first sound transmitted through the above two transmission paths, and the microphone may also send the first feedback signal to the feedback path calculation unit 142 and/or store it in a storage device (eg, , database 130).
  • a storage device eg, , database 130
  • the microphone at the second position can receive the second sound transmitted by the bone conduction speaker 122 in the second manner.
  • the second location may not be in contact with (the housing 121 of) the hearing device 120 but close to the first location.
  • the microphone is located at the second position, it can be considered that the microphone is suspended relative to the hearing device 120 .
  • the second position may be located inside or outside the (housing) of the hearing device 120 as long as the microphone is not rigidly or elastically connected to the hearing device 120 at this position. For example, in FIG.
  • the microphone since the microphone is not in contact with the casing 121 when the microphone is in the second position, the diaphragm of the microphone only receives the sound transmitted by the air, and will not be affected by the vibration of the casing 121 . Therefore, the second sound is only transmitted to the microphone by means of air conduction. That is to say, the above-mentioned second method only includes air conduction.
  • the microphone may generate a second feedback signal based on the second sound transmitted through the air conduction transmission path, and the microphone may also send the second feedback signal to the feedback path calculation unit 142 and/or store it in a storage device (eg, a database). 130).
  • the air conduction path from the bone conduction speaker 122 to the first position is the same as that of the first position.
  • the air conduction path of the bone conduction speaker 122 to the second position is the same.
  • the vibration of the housing 121 when the microphone is in the first position and the vibration direction of the housing 121 is perpendicular to the vibration direction of the diaphragm of the microphone, the vibration of the housing 121 will not cause the vibration components of the microphone (eg, vibration membrane) vibration. At this time, it can be considered that the microphone at the first position still only receives the sound transmitted by the air. Therefore, the process of the microphone receiving the second sound at the second position separated from the casing 121 can be replaced by adjusting the orientation of the microphone so that the vibration direction of the diaphragm is perpendicular to the vibration direction of the casing 121 when the microphone is at the first position.
  • the process of the microphone receiving the second sound at the second position separated from the casing 121 can be replaced by adjusting the orientation of the microphone so that the vibration direction of the diaphragm is perpendicular to the vibration direction of the casing 121 when the microphone is at the first position.
  • the diaphragm Since the diaphragm is not affected by the vibration of the casing 121, even if the microphone is attached to the casing 121, the second sound received by the microphone will only be transmitted through air conduction. Therefore, when the vibration direction of the diaphragm of the microphone is perpendicular to the vibration direction of the housing 121, only the air conduction feedback path transfer function needs to be considered when calculating the feedback path transfer function. It can be understood that when the bone conduction speaker 122 generates the first sound and the second sound respectively, it is only necessary to set the vibration direction of the diaphragm of the microphone to be parallel or perpendicular to the vibration direction of the housing 121 in the first position. The first feedback signal and the second feedback signal may also be output according to the received first sound and the second sound, respectively.
  • At least one detector may also include a first detector (eg, a first air conduction microphone) and a second detector (eg, a second detector) with the same structure and material air conduction microphone).
  • at least one detector eg, an air conduction microphone or a microphone
  • the microphones may be air conduction microphones and bone conduction microphones. For the convenience of understanding, in this application, the microphone may be an air conduction microphone.
  • the first detector and the second detector may be located at the first position and the second position, respectively, for receiving the first sound and the second sound. Similar to the foregoing embodiments, the first detector may output a first feedback signal after receiving the first sound, and the second detector may output a second feedback signal after receiving the second sound.
  • the first detector and the second detector can be placed in the first position and the second position at the same time, respectively, and the first detector and the second detector can simultaneously receive the same sound.
  • the bone conduction speaker 122 generates the first sound based on only one test tone signal (eg, the first test tone signal), the first detector and the second detector are located at the first position and the second position, respectively, and simultaneously receive the first sound .
  • the first detector and the second detector receive the same sound, because the first sound transmission path received by the first detector includes an air conduction transmission path and a vibration transmission path, and the second detector The received first sound only includes the air conduction transmission path, so the feedback signals output by the first detector and the second detector are different.
  • the feedback signal output by the first detector can also be called the first feedback signal.
  • the feedback signal output by the second detector can also be referred to as the second feedback signal, and as in the previous embodiment, the first feedback signal and the second feedback signal output by the same detector after the same detector is located at the first position and the second position respectively The difference is small and can be considered to be approximately the same.
  • Step 240 the feedback path calculation unit 142 determines the vibration transfer function of the bone conduction speaker 122 to the first position based on the first test tone signal, the second test tone signal, the first feedback signal and the second feedback signal.
  • step 240 may be performed by processing module 320 .
  • the feedback path calculation unit 142 may use the feedback path transfer function determination principle, based on the first test tone signal and the second test tone signal , the first feedback signal and the second feedback signal to calculate the feedback path transfer function. In some embodiments, the feedback path calculation unit 142 may obtain the first test tone signal from the test signal generation unit 141 . In some embodiments, after receiving the first test tone signal and the first feedback signal, the feedback path calculation unit 142 may calculate, based on the first test tone signal and the first feedback signal, that the first sound is transmitted from the bone conduction speaker 122 to the first sound The position of the first feedback path transfer function.
  • the feedback path calculation unit 142 may perform algorithmic transformation on the first test tone signal and the first feedback signal, respectively, to obtain the first test tone transformed signal and the first feedback transformed signal.
  • the feedback path calculation unit 142 may use Z transform to perform transform processing on the first test tone signal and the first feedback transformed signal.
  • the first test tone signal input by the bone conduction speaker 122 is Z transformed to obtain the first test tone transformed signal
  • the first feedback signal output by the air conduction microphone is Z transformed to obtain the first feedback transformed signal.
  • the algorithmic transformation may further include a Fourier transform, a Laplace transform, or a speech model solving method such as a linear predictive encoder, or the like.
  • transfer function determination methods may include, but are not limited to, cross-correlation methods, adaptive estimation methods, and the like.
  • the method for determining the transfer function may also be to obtain the transformed signal by performing algorithmic transformation on the sound signal and the electrical signal, and then calculate the transfer function according to the transformed signal. For details, please refer to formula (1)- (5) calculation method.
  • the feedback path calculation unit 142 may obtain the first feedback path transfer function by formula (1) based on the first test transformed signal and the first feedback transformed signal:
  • Y 1 (z) is the first test tone transformation signal
  • X 1 (z) is the first feedback transformation signal
  • F 1 (z) is the first feedback path transfer function.
  • the first feedback path transfer function F 1 (z) includes the effects of the air conduction transfer path and the vibration transfer path between the bone conduction speaker 122 to the first position.
  • the feedback path calculation unit 142 may obtain the second test tone signal from the test signal generation unit 141 . In some embodiments, after receiving the second test tone signal and the second feedback signal, the feedback path calculation unit 142 may calculate, based on the second test tone signal and the second feedback signal, that the second sound is transmitted from the bone conduction speaker 122 to the second sound The position of the second feedback path transfer function. For example, the feedback path calculation unit 142 may perform algorithmic transformation on the second test tone signal and the second feedback signal, respectively, to obtain the second test tone transformed signal and the second feedback transformed signal. In some embodiments, the feedback path calculation unit 142 may use Z transform to perform transform processing on the second test tone signal and the second feedback signal. For example, the second test tone signal input by the bone conduction speaker 122 is Z transformed to obtain the second test tone transformed signal, and the second feedback signal output by the microphone is Z transformed to obtain the second feedback transformed signal.
  • the feedback path calculation unit 142 can obtain the second feedback path transfer function by formula (2) based on the second test tone transformed signal and the second feedback transformed signal:
  • Y 2 (z) is the second test tone transformation signal
  • X 2 (z) is the second feedback transformation signal
  • F 2 (z) is the second feedback path transfer function.
  • the second feedback path transfer function F 2 (z) includes only the effect of the air conduction transfer path between the bone conduction speaker 122 and the second position (or first position).
  • the feedback path calculation unit 142 can determine the first feedback path transfer function corresponding to the first sound transmitted through the air conduction transmission path and the vibration transmission path, and determine the The transfer function of the second feedback path corresponding to the second sound transmitted by the conduction transfer path can be determined through subsequent calculation to determine the vibration transfer function of the bone conduction speaker 122 to the first position.
  • the feedback path calculation unit 142 may determine the vibration transfer function of the bone conduction speaker 122 to the first position based on the first feedback path transfer function F 1 (z) and the second feedback path transfer function F 2 (z) .
  • the first transmission path of the first sound received by the microphone at the first position includes an air conduction transmission path and a vibration transmission path
  • the second transmission path of the second sound received by the microphone at the second position is only air conduction transmission Therefore, the two output signals (ie, the first feedback signal and the second feedback signal) of the air conduction microphone are different.
  • the first feedback path transfer function including the air conduction path and the vibration transfer path can be expressed as:
  • a 1 (z) is the air conduction feedback path transfer function of the bone conduction speaker 122 to the first position
  • B 1 (z) is the vibration transfer function of the bone conduction speaker 122 to the first position
  • FIG. 6 shows a graph of the first feedback path transfer function F 1 (z) determined by equation (3).
  • the air conduction path of the bone conduction speaker 122 to the second position may be approximately equal to the air conduction path of the bone conduction speaker 122 to the first position . Therefore, the transfer function of the second feedback path including only the air conduction path can be expressed as:
  • a 2 (z) is the air conduction feedback path transfer function of the bone conduction speaker 122 to the second position, which is the same or approximately the same as the air conduction feedback path transfer function A 1 (z) of the bone conduction speaker 122 to the first position .
  • FIG. 7 shows a graph of the second feedback path function F 2 (z) determined by equation (2).
  • the second feedback path transfer function F 2 (z) includes only the effect of the air conduction transfer path between the bone conduction speaker 122 and the second position (or first position).
  • the feedback path calculation unit 142 may determine the vibration transfer function of the bone conduction speaker 122 to the first position based on the first feedback path transfer function F 1 (z) and the second feedback path transfer function F 2 (z) . Specifically, since the second feedback path transfer function F 2 (z) only includes the air conduction feedback path transfer function A 1 (z), and the first feedback path transfer function F 1 (z) includes the air conduction feedback path transfer function A 1 (z) and the vibration transfer function B 1 (z), so the feedback path calculation unit 142 can subtract the formula (3) and the formula (4) to calculate the vibration transfer function B 1 (z):
  • FIG. 6 is a graph of a first feedback path transfer function including an air conduction path and a vibration transfer path.
  • the curve in FIG. 6 represents the case where the air conduction feedback path and the vibration transmission path exist in the first sound received at the first position at the corresponding frequency. It can be seen that in the range around 1000Hz (for example, 600Hz-1000Hz), the effect of the bone conduction speaker on the first position through both the air conduction feedback path and the vibration transmission path produces a trough relative to other frequency ranges (ie, here It can be understood that the influence is small), in the range of 300Hz-400Hz and 2000Hz-3000Hz, the influence of the bone conduction speaker on the first position through the air conduction feedback path and the vibration transmission path at the same time produces a peak relative to other frequency ranges (ie, This can be understood as having a greater impact).
  • FIG. 7 is a graph of the transfer function of the second feedback path including only the air conduction path.
  • the curve in FIG. 7 represents the case where only the air conduction feedback path exists in the second sound received at the second position at the corresponding frequency.
  • the frequency when the frequency is in the range of 0Hz-1000Hz, the bone conduction speaker has less influence on the second position through the air conduction feedback path; when the frequency is in the range of 1000Hz-3000Hz, the bone conduction speaker has little effect on the second position through the air conduction feedback path.
  • Location has a big impact.
  • the curve shown in FIG. 8 can be obtained. It can be seen from Fig.
  • the vibration transmission path has a greater impact on the part with a frequency of 0Hz-1000Hz, and has less impact on the part with a frequency above 1000Hz.
  • Figure 6, Figure 7 and Figure 8 it can be seen that the effect of the bone conduction speaker on the first position through the vibration transmission path is mainly concentrated in the lower frequency range (for example, less than 1000Hz), while the bone conduction speaker through the air conduction transmission path.
  • the effect on the first position (or the second position) is mainly concentrated in the higher frequency range (eg, greater than 1000 Hz).
  • the feedback path calculation unit 142 may determine the vibration feedback signal of the bone conduction speaker 122 to the first position based on the first feedback signal and the second feedback signal.
  • the feedback path calculation unit 142 can obtain the vibration feedback signal by formula (6) based on the first feedback signal and the second feedback signal:
  • X 1 is the first feedback signal
  • X 2 is the second feedback signal
  • X d is the vibration feedback signal
  • the feedback path calculation unit 142 may determine the vibration transfer function of the bone conduction speaker 122 to the first position based on the first test tone signal, the second test tone signal and the vibration feedback signal.
  • the feedback path calculation unit 142 may perform algorithmic transformation on the first test tone signal, the second test tone signal and the vibration feedback signal respectively to obtain the first test tone transformed signal, the second test tone transformed signal and the vibration feedback signal Transform the signal. For example, performing Z algorithm transformation on the first test tone signal Y 1 to obtain the first test tone transformation signal Y 1 (z), and performing Z algorithm transformation on the second test tone signal Y 2 to obtain the second test tone transformation signal Y 2 (z ) ), performing Z-algorithm transformation on the second test tone signal X d to obtain a second test tone transformed signal X d (z).
  • the feedback path calculation unit 142 may determine the first feedback path transfer function of the sounding unit to the first position based on the first test tone transformation signal, the second test tone transformation signal and the vibration feedback transformation signal. Specifically, the feedback path calculation unit 142 may average or weight the average value of the first test tone transformed signal and the second test tone transformed signal to obtain the test tone mean value transformed signal.
  • the feedback path calculation unit 142 can obtain the test tone mean value transformed signal by formula (7) based on the first test tone transformed signal and the second test tone transformed signal:
  • Y 1 (z) is the first test tone transformed signal
  • Y 2 (z) is the second test tone transformed signal
  • Y d (z) is the test tone mean value transformed signal
  • the feedback path calculation unit 142 may obtain the vibration transfer function of the bone conduction speaker 122 to the first position based on the test sound mean value transformation signal and the vibration feedback transformation signal.
  • the feedback path calculation unit 142 can obtain the vibration transfer function of the bone conduction speaker 122 to the first position by formula (8) based on the test sound mean value transformation signal and the vibration feedback transformation signal:
  • Y d (z) is the test sound mean value transformation signal
  • X d (z) is the vibration feedback transformation signal
  • B 1 (z) is the vibration transfer function
  • the feedback path calculation unit 142 may further calculate an average value and a weighted average value of the first test tone signal and the second test tone signal to obtain a test tone average value signal. Algorithmically transform the test sound mean value signal and the vibration feedback signal to obtain the test sound mean value transform signal and the vibration feedback transform signal. Then, based on the test sound mean value transformation signal and the vibration feedback transformation signal, the vibration transfer function of the bone conduction speaker 122 to the first position is obtained.
  • the feedback path calculation unit 142 may include a first calculation unit and a second calculation unit, the first calculation unit may be used to calculate the first feedback path transfer function of the first feedback path, and the second calculation unit may be used to calculate the second feedback path Path transfer function.
  • first calculation unit may be used to calculate the first feedback path transfer function of the first feedback path
  • second calculation unit may be used to calculate the second feedback path Path transfer function.
  • FIG. 3 is an exemplary block diagram of a system for obtaining a vibration transfer function according to some embodiments of the present application.
  • the acquisition of vibration transfer function system 300 may be referred to simply as system 300 .
  • the system 300 may include a test tone generation module 310 and a processing module 320 .
  • the system 300 may be implemented by the system 100 (eg, the processor 140 ) shown in FIG. 1 .
  • the test tone generation module 310 may be used to generate a first test tone signal and a second test tone signal.
  • the first test tone signal or the second test tone signal may include at least one of a white noise signal, a pure tone signal, a pulsed signal, a narrowband noise, a narrowband warble tone, a modulated tone and/or a sweep tone signal.
  • the first test tone signal and the second test tone signal are of the same type and frequency.
  • the first test tone signal and the second test tone signal may be pure tone signals of the same frequency.
  • the types of the first test tone signal and the second test tone signal may also be different.
  • the first test tone signal may be white noise
  • the second test tone signal may be pure tone.
  • the test tone generation module 310 may only generate one type of test tone signal, for example, only the first test tone signal or the second test tone signal, which can also achieve the purpose of obtaining the vibration transfer function. For details, please refer to the steps 230 related description.
  • the processing module 320 may be configured to determine the vibration transfer function of the bone conduction speaker 122 to the first position based on the first test tone signal, the second test tone signal, the first feedback signal and the second feedback signal, the first feedback signal reflecting the vibration from the bone conduction speaker 122 to the first position.
  • the conduction speaker 122 transmits the signal to the first position through the vibration transmission path and the air conduction transmission path, and the second feedback signal reflects the signal transmitted from the bone conduction speaker 122 to the second position through the air conduction transmission path.
  • the first feedback signal and the second feedback signal may be output by at least one microphone after receiving the first sound at the first position and outputting the second sound at the second position, respectively; the first sound and the second sound may be conducted by bone conduction
  • the speakers 122 are generated based on the first test tone signal and the second test tone signal, respectively.
  • generating the first sound and the second sound based on the first test tone signal and the second test tone signal please refer to the detailed description of step 220, and details are not repeated here.
  • the processing module 320 may calculate the first feedback path transmission of the first sound from the bone conduction speaker 122 to the first position based on the first test tone signal and the first feedback signal function. For more details on calculating the transfer function of the first feedback path, please refer to the detailed description of step 240 in FIG. 2 , which will not be repeated here.
  • the processing module 320 may also calculate a second feedback path transfer function of the second sound from the bone conduction speaker 122 to the second location based on the second test tone signal and the second feedback signal.
  • a second feedback path transfer function of the second sound from the bone conduction speaker 122 to the second location based on the second test tone signal and the second feedback signal.
  • the processing module 320 may determine a vibration transfer function of the bone conduction speaker 122 to the first position based on the first feedback path transfer function and the second feedback path transfer function. For more details about determining the vibration transfer function of the bone conduction speaker 122 to the first position, please refer to the detailed description of step 240 in FIG. 2 , which will not be repeated here.
  • the processing module 320 may determine the vibration feedback signal of the bone conduction speaker 122 to the first position based on the first feedback signal and the second feedback signal. In some embodiments, the processing module 320 may also determine a vibration transfer function of the bone conduction speaker 122 to the first position based on the first test tone signal, the second test tone signal, and the vibration feedback signal. For more details about determining the vibration transfer function of the bone conduction speaker 122 to the first position, please refer to the detailed description of step 240 in FIG. 2 , which will not be repeated here.
  • the processing module 320 may include a first processing module and a second processing module, the first processing module may be used to calculate the first feedback path transfer function of the first feedback path, and the second processing module may be used to calculate the second feedback path transfer function function.
  • the first processing module may be used to calculate the first feedback path transfer function of the first feedback path
  • the second processing module may be used to calculate the second feedback path transfer function function.
  • a computer-readable storage medium including at least one processor 140 and at least one database 130; at least one database 130 is used to store computer instructions, and at least one processor 140 is used to execute At least a portion of the computer instructions to implement the method 200 as above.
  • FIG. 9 is an exemplary flowchart of a method for detecting a state of a bone conduction hearing device according to some embodiments of the present application.
  • the bone conduction hearing device may include at least a microphone, a speaker, a feedback analysis unit and a signal processing unit.
  • the microphones in this embodiment may include bone conduction microphones, air conduction microphones, etc., and the above microphones all belong to the detectors disclosed in other embodiments of the present application. For example, they may be the ones shown in FIGS. 4 and 5 . microphone shown.
  • the speaker in this embodiment is a bone conduction speaker, which may be the same as or different from the bone conduction speaker 122 in the previous embodiment, but both can be used to convert electrical signals into vibration signals.
  • the microphone and the bone conduction speaker are respectively installed in different positions of the bone conduction hearing device.
  • the microphone and the speaker are respectively fixed at different positions on the shell of the bone conduction hearing device.
  • the feedback analysis unit and the signal processing unit may be two separate devices, or may be components implementing two different functions in one device.
  • the feedback analysis unit and the signal processing unit can be combined into a state detection device.
  • the state detection device may be combined with the above-mentioned microphone and speaker to form an integral device, or may be a device independently provided with the above-mentioned microphone and speaker.
  • the bone conduction hearing device can realize the state before or during use.
  • Self-detection to detect whether it is in a normal state or an abnormal state, and the abnormal state includes one or more of incorrect wearing, abnormal structure of the bone conduction hearing device, foreign body intrusion, and foreign body occlusion.
  • the bone conduction hearing device can communicate and/or be connected with the detection device before or during use to detect the state of the bone conduction hearing device, and detect the state of the bone conduction hearing device.
  • the abnormal state includes one or more of incorrect wearing, abnormal structure of the bone conduction hearing device, foreign body intrusion, and foreign body occlusion.
  • the method for detecting the state of a bone conduction hearing device may include the following steps:
  • Step 910 generating a third sound based on the first signal by the speaker.
  • the first signal may be similar to the above-mentioned first test tone signal or second test tone signal, and details are not described herein.
  • step 910 may be performed by sound generation module 1010 .
  • the first signal (ie, the test sound signal) may be generated by the signal processing unit, the first signal may be transmitted to the speaker, and the speaker may convert the first signal into the third sound.
  • Step 920 the third sound is received by the microphone and a feedback signal is generated.
  • step 920 may be performed by the feedback signal generation module 1020 .
  • the microphone may generate a feedback signal based on the third sound, and send the feedback signal to the feedback analysis unit. In some embodiments, the microphone may generate the feedback signal in a similar or identical manner to generating the first feedback signal in the previous embodiments.
  • Step 930 the feedback analysis unit determines a feedback path transfer function from the speaker of the bone conduction hearing device to the microphone based on the feedback signal of the microphone and the first signal. Step 930 may be performed by the feedback analysis module 1030 .
  • the method for determining the feedback path transfer function from the speaker to the microphone of the bone conduction hearing device may be the same as the method for determining the first feedback path transfer function F 1 (z) and/or the second feedback path transfer function F 2 in FIG. 2 .
  • the method of (z) is the same.
  • the speaker-to-microphone feedback path transfer function F 3 (z) of the bone conduction hearing device can be determined by equation (9):
  • Y 3 (z) represents the first transformed signal obtained by Z-transformation of the first signal input by the bone conduction hearing device
  • X 3 (z) represents the feedback transformed signal obtained by Z-transformation of the feedback signal output by the microphone
  • the feedback path transfer function from the speaker to the microphone of the bone conduction hearing device can be determined by formula (9).
  • Step 940 acquiring at least one preset feedback path transfer function. Step 940 may be performed by the feedback analysis module 1030 .
  • the preset feedback path transfer function may be understood as a feedback path transfer function that is preset or stored in a storage device (eg, the database 130 ).
  • the preset feedback path transfer function may include a feedback path transfer function determined according to the methods disclosed in other embodiments of the present application (eg, step 240 ), for example, the first feedback path transfer function.
  • the preset feedback path transfer function may also be a feedback path transfer function manually set by the operator according to experience.
  • the at least one predetermined feedback path transfer function may include at least one of a standard feedback path transfer function or an abnormal feedback path transfer function.
  • the standard feedback path transfer function may refer to the feedback path transfer function corresponding to the normal state of the bone conduction hearing device.
  • the standard feedback path transfer function can reflect the feedback path feature function of the bone conduction hearing device when worn by a large range of people, or it can be a personalized feedback path feature function when a specific user is wearing and using it normally.
  • the abnormal feedback path transfer function may refer to the feedback path transfer function corresponding to the abnormal state of the bone conduction hearing device.
  • the abnormal feedback path transfer function includes one or more of the incorrect wearing feedback path transfer function, the abnormal structure feedback path transfer function of the bone conduction hearing device, the foreign body invasion feedback path transfer function, and the foreign body occlusion feedback path transfer function.
  • the abnormal feedback path may include a variety of abnormal feedback conditions that may occur.
  • the at least one preset feedback path transfer function may include a feedback path transfer function from the speaker to the microphone when the bone conduction hearing device is in different states.
  • the different wearing states of the bone conduction hearing device may include the state when it is worn by the user (when the speaker or the shell of the bone conduction hearing device is attached to the user's face) and the state when it is not worn by the user (when the bone conduction hearing device is not worn by the user).
  • the speaker or housing of the hearing device does not fit the user's face).
  • the at least one preset feedback path transfer function may include a feedback path transfer function when the bone conduction hearing device is worn by a user (also referred to as a "first preset feedback path transfer function") and a feedback when the bone conduction hearing device is not worn by the user.
  • Path transfer function may also be referred to as "second preset feedback path transfer function").
  • Step 950 compare the transfer function of the feedback path with at least one preset transfer function of the feedback path.
  • Step 950 may be performed by the feedback analysis module 1030 .
  • the feedback path transfer function determined in step 930 may be compared with a preset feedback path transfer function to determine the state of the bone conduction hearing device. In some embodiments, it may be determined whether the difference between the transfer function of the feedback path and the standard feedback function in the at least one preset transfer function of the feedback path is within a preset threshold range: if so, it is determined that the transfer function of the feedback path is normal; if not, the transfer function of the feedback path is determined to be normal; Then it is determined that the transfer function of the feedback path is abnormal.
  • the above-mentioned preset threshold range may be set manually, and may be adjusted according to different situations, which is not limited in this application.
  • the at least one preset feedback path transfer function includes at least two, the preset feedback path transfer function with the smallest difference from the feedback path transfer function is determined as the preset feedback path transfer function.
  • the at least one preset feedback path transfer function includes a first preset feedback path transfer function and a second preset feedback path transfer function, and a difference between the first preset feedback path transfer function and the feedback path transfer function is greater than the second preset transfer function The difference between the feedback path transfer function and the feedback path transfer function determines the second preset feedback path transfer function as the preset feedback path transfer function.
  • Step 960 the signal processing unit determines the state of the bone conduction hearing device according to the comparison result. Step 960 may be performed by the signal processing module 1040 .
  • the comparison results may include normal or abnormal feedback path transfer functions.
  • the transfer function of the feedback path is normal, it is determined that the state of the bone conduction hearing device is normal; if the transfer function of the feedback path is abnormal, it is determined that the state of the bone conduction hearing device is abnormal.
  • the state of the bone conduction hearing device may include: a normal state, an abnormal state, and the abnormal state includes one or more of incorrect wearing, structural abnormality of the bone conduction hearing device, foreign body intrusion, and foreign body occlusion.
  • the wearing state may be understood as the bone conduction hearing device being worn on the wearer's body; the non-wearing state may be understood as the bone conduction hearing device not being worn on the wearer's body;
  • the structurally normal state may refer to the structure and/or The components are in a normal working state, so that the bone conduction hearing device can be used normally;
  • the structural abnormal state is the opposite of the structural normal state, indicating that the structure and/or components of the bone conduction hearing device are not in a normal working state (for example, the bone conduction hearing device due to collision dislocation, movement, and damage of components on the device);
  • the foreign body invasion state may refer to the entry of objects other than the structure and/or components of the bone conduction hearing device into the inside of the bone conduction hearing device.
  • a structurally normal state may be classified as a normal state, and a structurally abnormal state and a foreign body intrusion state may be classified as an abnormal state.
  • the comparison result may reflect the wearing state of the bone conduction audiometric device, for example, the wearing state, the non-wearing state.
  • the feedback path transfer function of the bone conduction hearing device in a normal state eg, a structurally normal state
  • an abnormal state eg, a foreign body invasion state
  • the feedback path transfer function corresponding to the bone conduction hearing device in an abnormal state may be used as the abnormal feedback path transfer function
  • the transfer function corresponding to the normal state may be used.
  • the feedback path transfer function of the bone conduction hearing device in (eg, structurally normal state) serves as the standard feedback path transfer function.
  • the database 130 may store multiple preset feedback path transfer functions, and each preset feedback path transfer function corresponds to a state (normal state, abnormal state) of the bone conduction hearing device. According to steps 950 and 960, by comparing the feedback path transfer function of the current bone conduction hearing device with the preset feedback path transfer function in the database 130, it is possible to match the feedback path transfer function in the database 130 that is the closest to the feedback path transfer function of the current bone conduction hearing device. If the preset feedback path transfer function is close to the preset feedback path transfer function, the state of the bone conduction hearing device corresponding to the matching preset feedback path transfer function is the current state of the bone conduction hearing device. Therefore, according to the procedure described above, the current state of the bone conduction hearing device can be determined in real time.
  • comparing the results may include identifying different classifications of predetermined feedback path transfer functions, which in turn may determine different states of the bone conduction hearing device.
  • the types of preset feedback path transfer functions may include standard feedback path transfer functions, abnormal feedback path transfer functions; abnormal feedback path transfer functions include incorrect wearing feedback path transfer functions, abnormal feedback path of bone conduction hearing device structure One or more of the transfer function, the transfer function of the foreign object intrusion feedback path, and the transfer function of the foreign object occlusion feedback path. According to the type of the preset feedback path transfer function that is within the preset threshold range with the feedback path transfer function, the type of the feedback path transfer function can be determined, thereby determining different states of the bone conduction hearing device.
  • the type of the obtained preset feedback path transfer function corresponds to a tight fit (that is, the bone conduction hearing device fits closely with the user)
  • the type of the feedback path transfer function also corresponds to a tight fit.
  • the hearing-guiding device fits closely with the user.
  • the type of the feedback path transfer function also corresponds to the loose fit, and accordingly, it can be reflected that the bone conduction hearing device does not fit closely with the user.
  • different preset feedback path transfer functions may correspond to different head parts worn by the bone conduction hearing device.
  • the type of the obtained preset feedback path transfer function corresponds to a certain part of the head (for example, the mastoid, the temporal bone, or the forehead)
  • the type of the feedback path transfer function also corresponds to the head part, and the corresponding , which can reflect the position of the user's head (eg, at the mastoid, temporal bone, or forehead) that the user is wearing with bone conduction hearing.
  • the signal processing module 1040 may adaptively adjust the parameters of the bone conduction hearing device according to the above state. In some embodiments, after determining the state of the bone conduction hearing device, the signal processing module 1040 may also send reminder information to the user according to the above state. In some embodiments, if the state of the bone conduction hearing device is abnormal, the user is reminded to adjust the state of the bone conduction hearing device. In some embodiments, the manner of reminding the user may include, but is not limited to, a voice prompt, a prompt light prompt, a vibration prompt, a text prompt, a remote message, and the like.
  • the voice prompt may be voice information sent by the bone conduction hearing device, for example, "There is a foreign object in the device".
  • the prompt light prompt may refer to a prompt light provided on the bone conduction hearing device. When the state of the bone conduction hearing device is normal, a green light is displayed, and when the state of the bone conduction hearing device is abnormal, a red light is displayed to remind the wearer.
  • the vibration prompt may mean that the bone conduction hearing device will vibrate when the state of the bone conduction hearing device is abnormal. For example, if it vibrates three times, it means that there is a structural abnormality; if it vibrates continuously, it means that there is foreign body intrusion.
  • the text prompt may refer to text information displayed on the bone conduction hearing device or a terminal that communicates and/or connects with the bone conduction hearing device to remind the user, such as "foreign body intrusion in the device", "structure abnormality in the device”.
  • the state of the bone conduction hearing device includes a variety of states, but which states are normal states and which states are abnormal states can be set by the operator based on experience, or set by the user, and can also be set by the signal processing module 1040. set up.
  • states are normal states and which states are abnormal states can be set by the operator based on experience, or set by the user, and can also be set by the signal processing module 1040. set up.
  • FIG. 10 is an exemplary block diagram of a system for detecting the status of a bone conduction hearing device according to some embodiments of the present application.
  • the system 1000 for detecting the state of a bone conduction hearing device may be simply referred to as the system 1000 .
  • the system 1000 includes a sound generation module 1010 , a feedback signal generation module 1020 , a feedback analysis module 1030 and a signal processing module 1040 .
  • the sound generating module 1010 can be used to generate a third sound based on the first signal; wherein the first signal is generated by the signal processing unit.
  • the sound generating module 1010 may be a bone conduction speaker, or be part of a bone conduction speaker.
  • FIG. 9 For more details about generating the third sound based on the first signal, please refer to the detailed description in FIG. 9 , which will not be repeated here.
  • the feedback signal generating module 1020 may be configured to receive the third sound and generate a feedback signal.
  • the feedback signal generating module 1020 may be a microphone, or a part of a microphone, or any acoustoelectric sensor or vibration sensor.
  • the feedback signal generating module 1020 may be a microphone, or a part of a microphone, or any acoustoelectric sensor or vibration sensor.
  • the feedback analysis module 1030 can be used to determine the feedback path transfer function from the speaker of the bone conduction hearing device to the microphone based on the feedback signal and the first signal; the feedback analysis module can also be used to obtain at least one preset feedback path transfer function; in addition, the feedback The analysis module can also be used to compare the feedback path transfer function with at least one preset feedback path transfer function. For more details about determining the transfer function of the feedback path, comparing the transfer function of the feedback path and the at least one preset feedback path transfer function, please refer to the detailed description in FIG. 9 , which will not be repeated here.
  • the signal processing module 1040 may be configured to determine the state of the bone conduction hearing device according to the comparison result. For more details on determining the state of the bone conduction hearing device, please refer to the detailed description in FIG. 9 , which will not be repeated here.
  • a computer-readable storage medium stores computer instructions, and after the computer reads the computer instructions in the storage medium, the computer executes: generating a third sound based on the first signal;
  • the first signal may be a test signal generated by a computer; receiving a third sound and generating a feedback signal; determining a feedback path transfer function from the speaker of the bone conduction hearing device to the microphone based on the feedback signal and the first signal; acquiring at least one preset feedback path transfer function; compare the feedback path transfer function with at least one preset feedback path transfer function; determine the state of the bone conduction hearing device according to the comparison result.
  • the above description of the system and its devices/modules is only for the convenience of description, and does not limit the present application to the scope of the illustrated embodiments. It can be understood that for those skilled in the art, after understanding the principle of the system, it is possible to arbitrarily combine various devices/modules without departing from this principle, or form a subsystem to connect with other devices/modules .
  • the feedback analysis module 1030 and the signal processing module 1040 disclosed in FIG. 10 may be different modules in a device (eg, the processor 140 ), or may be a module implementing the functions of the above two or more modules.
  • the feedback analysis module 1030 and the signal processing module 1040 may be two modules, or one module may have the functions of analyzing signals and processing signals at the same time.
  • each module may have its own storage module.
  • each module may share one storage module.
  • the possible beneficial effects of the embodiments of the present application include, but are not limited to: (1) the vibration transfer function of the bone conduction speaker can be measured without using an external device such as an accelerometer, which makes the testing process simpler and more convenient;
  • the feedback path transfer function detects the current state of the bone conduction hearing device, and sends a corresponding reminder to the user according to the state of the bone conduction hearing device, so that the user can know or adjust the state of the bone conduction hearing device, thereby improving user experience.
  • different embodiments may have different beneficial effects, and in different embodiments, the possible beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.

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Abstract

本申请实施例公开了一种检测骨导听力设备状态的方法和系统，骨导听力设备至少包括麦克风、扬声器、反馈分析单元和信号处理单元，该方法包括：由扬声器基于第一信号产生第三声音；其中，第一信号由信号处理单元产生；由麦克风接收第三声音并产生反馈信号；由反馈分析单元基于麦克风的反馈信号和所述第一信号，确定骨导听力设备的扬声器到麦克风的反馈路径传递函数；获取至少一个预设反馈路径传递函数；比较反馈路径传递函数和至少一个预设反馈路径传递函数；由信号处理单元根据比较结果，确定骨导听力设备的状态。

Description

一种检测骨导听力设备状态的方法和系统 技术领域
本申请涉及听力设备技术领域，特别涉及一种检测骨导听力设备状态的方法和系统。
背景技术
听力设备(例如，助听器)通常同时具备麦克风和扬声器，听力设备的状态对听力设备的使用影响极大。听力设备的状态异常会导致听力设备的输出灵敏度大幅度地降低或者直接导致听力设备产生故障(例如，发生啸叫)。因此，听力设备状态的检测对于保证听力设备的正常使用，降低听力设备异常可能带来的损伤具有重要意义。在骨传导听力装置(例如，骨传导助听器)中，反馈路径传递函数是反映听力设备状态的重要指标。在一些场景下，通过检测并评估骨传导听力装置的反馈路径传递函数，可以直观地反映出骨传导听力装置的实时状态。
发明内容
本申请实施例之一还提供一种检测骨导听力设备状态的方法，其中，所述骨导听力设备至少包括麦克风、扬声器、反馈分析单元和信号处理单元，所述方法包括：由所述扬声器基于第一信号产生第三声音；其中，所述第一信号由所述信号处理单元产生；由所述麦克风接收所述第三声音并产生反馈信号；由所述反馈分析单元基于所述麦克风的反馈信号和所述第一信号，确定所述骨导听力设备的所述扬声器到所述麦克风的反馈路径传递函数；获取至少一个预设反馈路径传递函数；比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数；由所述信号处理单元根据比较结果，确定所述骨导听力设备的状态。
在一些实施例中，所述至少一个预设反馈路径传递函数包括标准反馈路 径传递函数、异常反馈路径传递函数；异常反馈路径传递函数包括佩戴不正确反馈路径传递函数、骨导听力设备结构异常反馈路径传递函数、异物侵入反馈路径传递函数、异物遮挡反馈路径传递函数中一个或多个；所述比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数包括：确定与所述反馈路径传递函数在预设阈值范围内的所述至少一个预设反馈路径传递函数；基于所述至少一个预设反馈路径传递函数的类型，确定所述反馈路径传递函数的类型。
在一些实施例中，基于所述至少一个预设反馈路径传递函数的类型，确定所述反馈路径传递函数的类型包括：若所述至少一个预设反馈路径传递函数的类型为标准反馈路径传递函数，则确定所述反馈路径传递函数的类型正常；或者若所述至少一个预设反馈路径传递函数的类型为异常反馈路径传递函数，则确定所述反馈路径传递函数的异常类型；进一步包括：若所述至少一个预设反馈路径传递函数的类型为佩戴不正确反馈路径传递函数，则确定所述反馈路径传递函数的类型为佩戴不正确；或者若所述至少一个预设反馈路径传递函数的类型为骨导听力设备结构异常反馈路径传递函数，则确定所述反馈路径传递函数的类型为骨导听力设备结构异常；或者若所述至少一个预设反馈路径传递函数的类型为异物侵入反馈路径传递函数，则确定所述反馈路径传递函数的类型为异物侵入；或者若所述至少一个预设反馈路径传递函数的类型为异物遮挡反馈路径传递函数，则确定所述反馈路径传递函数的类型为异物遮挡。
在一些实施例中，所述确定与所述反馈路径传递函数在预设阈值范围内的所述至少一个预设反馈路径传递函数包括：若所述至少一个预设反馈路径传递函数包括至少两个，则确定差值最小的预设反馈路径传递函数为所述预设反馈路径传递函数。
在一些实施例中，所述根据比较结果，确定所述骨导听力设备的状态包括：若所述反馈路径传递函数的类型为正常，则确定所述骨导听力设备的状态正常；或者若所述反馈路径传递函数的类型为异常，则确定所述骨导听力设备的状态异常；进一步包括确定所述骨导听力设备的异常类型：若所述反馈路径 传递函数的类型为佩戴不正确，则确定所述骨导听力设备的状态为佩戴不正确；或者若所述反馈路径传递函数的类型为骨导听力设备结构异常，则确定所述骨导听力设备的状态为结构异常；或者若所述反馈路径传递函数的类型为异物侵入，则确定所述骨导听力设备的状态为异物侵入；或者若所述反馈路径传递函数的类型为异物遮挡，则确定所述骨导听力设备的状态为异物遮挡。
在一些实施例中，所述方法还包括：根据所述骨导听力设备的状态，自适应调整所述骨导听力设备的参数或发送提醒信息给用户。
在一些实施例中，所述骨导听力设备的状态包括以下至少一种：正常状态、异常状态；异常状态包括佩戴不正确、骨导听力设备结构异常、异物侵入、异物遮挡中一个或多个。
本申请实施例之一还提供一种检测骨导听力设备状态的系统，其中，所述骨导听力设备至少包括麦克风、扬声器、反馈分析单元和信号处理单元，所述系统包括：所述扬声器被配置为基于第一信号产生第三声音；其中，所述第一信号由所述信号处理单元产生；所述麦克风被配置为接收所述第三声音并产生反馈信号；所述反馈分析单元被配置为基于所述麦克风的反馈信号和所述第一信号，确定所述骨导听力设备的所述扬声器到所述麦克风的反馈路径传递函数；获取至少一个预设反馈路径传递函数；比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数；所述信号处理单元被配置为根据比较结果，确定所述骨导听力设备的状态。
在一些实施例中，所述至少一个预设反馈路径传递函数包括标准反馈路径传递函数、异常反馈路径传递函数；异常反馈路径传递函数包括佩戴不正确反馈路径传递函数、骨导听力设备结构异常反馈路径传递函数、异物侵入反馈路径传递函数、异物遮挡反馈路径传递函数中一个或多个；所述比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数包括：确定与所述反馈路径传递函数在预设阈值范围内的所述至少一个预设反馈路径传递函数；基于所述至少一个预设反馈路径传递函数的类型，确定所述反馈路径传递函数的类型。
在一些实施例中，基于所述至少一个预设反馈路径传递函数的类型，确定所述反馈路径传递函数的类型包括：若所述至少一个预设反馈路径传递函数的类型为标准反馈路径传递函数，则确定所述反馈路径传递函数的类型正常；或者若所述至少一个预设反馈路径传递函数的类型为异常反馈路径传递函数，则确定所述反馈路径传递函数的异常类型；进一步包括：若所述至少一个预设反馈路径传递函数的类型为佩戴不正确反馈路径传递函数，则确定所述反馈路径传递函数的类型为佩戴不正确；或者若所述至少一个预设反馈路径传递函数的类型为骨导听力设备结构异常反馈路径传递函数，则确定所述反馈路径传递函数的类型为骨导听力设备结构异常；或者若所述至少一个预设反馈路径传递函数的类型为异物侵入反馈路径传递函数，则确定所述反馈路径传递函数的类型为异物侵入；或者若所述至少一个预设反馈路径传递函数的类型为异物遮挡反馈路径传递函数，则确定所述反馈路径传递函数的类型为异物遮挡。
在一些实施例中，所述确定所述反馈路径传递函数在预设阈值范围内的所述至少一个预设反馈路径传递函数包括：若所述至少一个预设反馈路径传递函数包括至少两个，则确定差值最小的预设反馈路径传递函数为所述预设反馈路径传递函数。
在一些实施例中，所述根据比较结果，确定所述骨导听力设备的状态包括：若所述反馈路径传递函数的类型为正常，则确定所述骨导听力设备的状态正常；或者若所述反馈路径传递函数的类型为异常，则确定所述骨导听力设备的状态异常；进一步包括确定所述骨导听力设备的异常类型：若所述反馈路径传递函数的类型为佩戴不正确，则确定所述骨导听力设备的状态为佩戴不正确；或者若所述反馈路径传递函数的类型为骨导听力设备结构异常，则确定所述骨导听力设备的状态为结构异常；或者若所述反馈路径传递函数的类型为异物侵入，则确定所述骨导听力设备的状态为异物侵入；或者若所述反馈路径传递函数的类型为异物遮挡，则确定所述骨导听力设备的状态为异物遮挡。
在一些实施例中，所述信号处理单元被配置为：根据所述骨导听力设备 的状态，自适应调整所述骨导听力设备的参数或发送提醒信息给用户。
在一些实施例中，所述骨导听力设备的状态包括以下至少一种：正常状态、异常状态；异常状态包括佩戴不正确、骨导听力设备结构异常、异物侵入、异物遮挡中一个或多个。
本申请实施例之一还提供一种骨导听力设备状态的检测系统，其中，所述系统包括声音产生模块、反馈信号产生模块、反馈分析模块和信号处理模块；其中：所述声音产生模块，用于基于第一信号产生第三声音；其中，所述第一信号由所述信号处理单元产生；所述反馈信号产生模块，用于接收所述第三声音并产生反馈信号；所述反馈分析模块，用于基于所述反馈信号和所述第一信号，确定所述骨导听力设备的扬声器到麦克风的反馈路径传递函数；获取至少一个预设反馈路径传递函数；比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数；所述信号处理模块，用于根据比较结果，确定所述骨导听力设备的状态。
本申请实施例之一还提供一种计算机可读存储介质，所述存储介质存储计算机指令，当计算机读取所述存储介质中的所述计算机指令后，所述计算机执行：基于第一信号产生第三声音；其中，所述第一信号为所述计算机产生的测试信号；接收所述第三声音并产生反馈信号；基于所述反馈信号和所述第一信号，确定所述骨导听力设备的所述扬声器到所述麦克风的反馈路径传递函数；获取至少一个预设反馈路径传递函数；比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数；根据比较结果，确定所述骨导听力设备的状态。
附图说明
本申请将以示例性实施例的方式进一步说明，这些示例性实施例将通过附图进行详细描述。这些实施例并非限制性的，在这些实施例中，相同的编号表示相同的结构，其中：
图1是根据本申请一些实施例所示的传递函数检测系统的应用场景示意 图；
图2是根据本申请一些实施例所示的获取振动传递函数方法的实例性流程图；
图3是根据本申请一些实施例所示的获取振动传递函数系统的示例性模块图；
图4是根据本申请一些实施例中所示的探测器处于第一位置时传递函数检测系统的示意图；
图5是根据本申请一些实施例中所示的探测器处于第二位置时传递函数检测系统的示意图；
图6是根据本申请一些实施例所示的第一反馈路径传递函数的曲线图；
图7是根据本申请一些实施例所示的第二反馈路径传递函数的曲线图；
图8是根据本申请一些实施例所示的振动传递函数的曲线图；
图9是根据本申请一些实施例所示的检测骨导听力设备状态的方法的示例性流程图；以及
图10是根据本申请一些实施例所示的检测骨导听力设备状态的系统的示例性模块图。
具体实施方式
为了更清楚地说明本申请实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单的介绍。显而易见地，下面描述中的附图仅仅是本申请的一些示例或实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图将本申请应用于其它类似情景。除非从语言环境中显而易见或另做说明，图中相同标号代表相同结构或操作。
应当理解，本文使用的“系统”、“装置”和/或“模块”是用于区分不同级别的不同组件、元件、部件、部分或装配的一种方法。然而，如果其他词语可实现相同的目的，则可通过其他表达来替换所述词语。
如本申请和权利要求书中所示，除非上下文明确提示例外情形，“一”、“一个”、“一种”和/或“该”等词并非特指单数，也可包括复数。一般说来，术语“包括”与“包含”仅提示包括已明确标识的步骤和元素，而这些步骤和元素不构成一个排它性的罗列，方法或者设备也可能包含其它的步骤或元素。
本申请中使用了流程图用来说明根据本申请的实施例的系统所执行的操作。应当理解的是，前面或后面操作不一定按照顺序来精确地执行。相反，可以按照倒序或同时处理各个步骤。同时，也可以将其他操作添加到这些过程中，或从这些过程移除某一步或数步操作。
为了方便说明，下文以骨传导扬声器或扬声器为例对发声单元的使用和应用过程进行说明。应该注意的是，上述描述仅出于说明性目的而提供，并不旨在限制本申请的范围。
以下，不失一般性，在描述本发明中骨传导相关技术时，将采用“骨导听力设备”、“骨传导听力设备”、“骨传导扬声器”、“扬声器装置”或“骨传导耳机”的描述。该描述仅仅为骨传导应用的一种形式，对于该领域的普通技术人员来说，“扬声器”或“耳机”也可用其他同类词语代替，比如“播放器”、“助听器”等。事实上，本发明中的各种实现方式可以很方便地应用到其它非扬声器类的听力设备上。例如，对于本领域的专业人员来说，在了解骨传导扬声器的基本原理后，可能在不背离这一原理的情况下，对实施骨传导扬声器的具体方式与步骤进行形式和细节上的各种修正和改变，特别地，在骨传导扬声器中加入环境声音拾取和处理功能，使该扬声器实现助听器的功能。例如，麦克风等传声器可以拾取使用者/佩戴者周围环境的声音，在一定的算法下，将声音处理后(或者产生的电信号)传送至骨传导扬声器部分。即骨传导扬声器可以经过一定的修改，加入拾取环境声音的功能，并经过一定的信号处理后通过骨传导扬声器部分将声音传递给使用者/佩戴者，从而实现骨传导助听器的功能。作为举例，这里所说的算法可以包括噪声消除、自动增益控制、声反馈抑制、宽动态范围压缩、主动环境识别、主动抗噪、定向处理、耳鸣处理、多 通道宽动态范围压缩、主动啸叫抑制、音量控制等一种或多种的组合。
在一些实施例中，听力设备(例如，助听器)通常同时具备麦克风和扬声器。扬声器发出的声音可能有一部分会被麦克风接收，从而产生啸叫，或者导致用户(例如，佩戴者)在使用该设备的过程中听见回声。为了抑制回声或啸叫，需要尽可能地减小扬声器对麦克风的影响(例如，在麦克风接收到的信号中去除扬声器发出的声音)。通常扬声器对麦克风的影响可以通过扬声器到麦克风之间的反馈路径传递函数来表示。在一些实施例中，在骨传导听力装置(例如，骨传导助听器)中，骨传导扬声器产生的声音会同时通过振动和空气传导的方式对麦克风产生影响。因此，骨传导扬声器到麦克风之间的反馈路径不仅包含气传导传递路径，还包含振动传递路径。这两种传递路径会对应骨传导扬声器到麦克风之间不同的传递函数。在一些场景下，需要更好地评估骨传导扬声器通过不同传递路径，尤其是振动传递路径，对麦克风的影响。对于振动传递函数测量，通常需要用到加速度传感器等额外器件，测试较为复杂。
因此，本申请一些实施例提供了一种获取骨传导扬声器到其它位置(例如，麦克风所在的位置，其通过壳体与骨传导扬声器相连)的振动传递函数方法，利用探测器分别在第一位置接收包含通过气传导传递路径和振动传递路径传递的第一声音和在第二位置接收只包含通过气传导传递路径的第二声音，从而计算出振动传递函数，该测试方法效率更高、操作更简便。
图1是根据本申请一些实施例所示的传递函数检测系统的应用场景示意图。为了描述方便，传递函数检测系统100可以简称为系统100。系统100可以包括探测器110、听力设备120、数据库130和处理器140。该系统100中的各个组件之间可以通过包括无线连接、有线连接、或使得能够进行数据发送和/或接收的任何其他通信和/或连接和/或这些连接的任何组合。在一些实施例中，基于系统100可以实现获取骨导听力设备的振动传递函数以及检测骨导听力设备的状态的目的。
在一些实施例中，有线连接包括但不限于使用金属电缆、光学电缆或者 金属和光学的混合电缆，例如：同轴电缆、通信电缆、软性电缆、螺旋电缆、非金属护皮电缆、金属护皮电缆、多芯电缆、双绞线电缆、带状电缆、屏蔽电缆、电信电缆、双股电缆、平行双芯导线、和双绞线。
以上描述的例子仅作为方便说明之用，有线连接的媒介还可以是其它类型，例如，其它电信号或光信号等的传输载体。无线连接包括但不限于无线电通信、自由空间光通信、声通讯、和电磁感应等。其中无线电通讯包括但不限于，IEEE302.11系列标准、IEEE302.15系列标准(例如，蓝牙技术和紫蜂技术等)、第一代移动通信技术、第二代移动通信技术(例如，FDMA、TDMA、SDMA、CDMA和SSMA等)、通用分组无线服务技术、第三代移动通信技术(例如，CDMA2000、WCDMA、TD-SCDMA和WiMAX等)、第四代移动通信技术(例如，TD-LTE和FDD-LTE等)、卫星通信(例如，GPS技术等)、近场通信(NFC)和其它运行在ISM频段(例如，2.4GHz等)的技术；自由空间光通信包括但不限于可见光、红外线讯号等；声通讯包括但不限于声波、超声波讯号等；电磁感应包括但不限于近场通讯技术等。以上描述的例子仅作为方便说明之用，无线连接的媒介还可以是其它类型，例如，Z-wave技术、其它收费的民用无线电频段和军用无线电频段等。
在一些实施例中，听力设备120通常可以包括气传导扬声器和骨传导扬声器。在一些实施例中，听力设备120可以包括骨传导扬声器(例如，如图4和图5所示的骨传导扬声器122)和壳体121。骨传导扬声器122以及其余部件(例如，麦克风)可以容纳于壳体121内。为了抑制骨传导扬声器122对麦克风的影响，需要计算出骨传导扬声器122到装置的某个感兴趣位置(例如，如图1、图4中的123所示)的振动传递函数。需要知道的是，感兴趣的某个位置可以是某个麦克风(例如，听力设备120上实际安装的麦克风)的放置位置，也可以为听力设备120内部或外部的任意一处(例如，听力设备120上任一与骨传导扬声器122刚性或者弹性相连的部位)。
在一些实施例中，探测器110可以接收骨传导扬声器122发出的声音， 然后可以基于该声音产生反馈信号。所述反馈信号可以反映骨传导扬声器122对探测器110(所在位置)的影响。例如，该反馈信号可以被发送至处理器140，再由处理器140根据该反馈信号计算出骨传导扬声器122到探测器110的反馈路径传递函数。在一些实施例中，探测器110还可以接收到环境中的声音并基于该声音产生音信号。环境中的声音可以包括例如人声、车声、周围环境的噪声等。在一些实施例中，探测器110可以将该音信号发送给骨传导扬声器122和处理器140，骨传导扬声器122可以基于该音信号产生声音。在一些实施例中，探测器110可以将该音信号发送给处理器140，再由处理器140发送给骨传导扬声器122，骨传导扬声器122可以基于该音信号产生声音。在一些实施例中，探测器110可以包括声电转换器，例如麦克风。示例性地，麦克风可以包括带状麦克风、微机电系统(MEMS)麦克风、动态麦克风、压电麦克风、电容式麦克风、碳素麦克风、模拟麦克风、数字麦克风等，或其任意组合。再例如，麦克风可以包括全向麦克风、单向麦克风、双向麦克风、心形麦克风等，或其任意组合。在一些实施例中，探测器110还可以包括气传导麦克风和骨传导麦克风。为了方便描述，本申请将麦克风作为探测器110进行说明。
处理器140可以处理从探测器110、骨传导扬声器122、数据库130或系统100的其他组件获得的数据和/或信息。例如，处理器140可以处理由麦克风拾取骨传导扬声器122发出的声音后产生的电信号，并以此计算出骨传导扬声器122到麦克风的反馈路径传递函数。在一些实施例中，处理器140可以是单一服务器或服务器组。服务器组可以是集中式的或分布式的。在一些实施例中，处理器140可以是本地或远程的。例如，处理器140可以从探测器110、骨传导扬声器122和/或数据库130访问信息和/或数据。又例如，处理器140可以直接连接到探测器110、骨传导扬声器122和/或数据库130以访问信息和/或数据。
在一些实施例中，处理器140可以包括测试信号生成单元141和反馈路径计算单元142(如图4和5所示)。测试信号生成单元141可以向骨传导扬声器122和反馈路径计算单元142发送测试音信号(例如，第一测试音信号)。 骨传导扬声器122基于测试音信号可以产生声音(例如，第一声音)，探测器110接收到骨传导扬声器122发出的声音后可以基于该声音产生反馈信号(例如，第一反馈信号)并将该反馈信号发送给反馈路径计算单元142，反馈路径计算单元142可以基于测试音信号以及探测器110输出的反馈信号计算反馈路径传递函数。在一些实施例中，基于包括有气传导传递路径和振动传递路径的反馈信号及其对应的测试音信号，反馈路径计算单元142可以确定对应的反馈路径传递函数(即，第一反馈路径传递函数)，基于只包含气传导传递路径的反馈信号及其对应的测试音信号，反馈路径计算单元142可以确定对应的反馈路径传递函数(即，第二反馈路径传递函数)。在一些实施例中，反馈路径计算单元142可以基于前述确定的两个反馈路径传递函数确定振动传递函数。
在一些实施例中，处理器140还可以包括反馈分析单元和信号处理单元。在一些实施例中，处理器140可以基于探测器110的反馈信号，实时确定骨导听力设备的骨传导扬声器122到探测器110的反馈路径传递函数。处理器140还可以将实时确定的反馈路径传递函数与预设的其他反馈路径传递函数进行比较，以确定骨导听力设备的实时状态。
数据库130可以存储数据、指令和/或任何其他信息。例如，上述第一反馈路径传递函数等。在一些实施例中，数据库130可以存储从探测器110、骨传导扬声器122和/或处理器140获得的数据。在一些实施例中，数据库130可以存储处理器140用来执行或使用来完成本申请中描述的示例性方法的数据和/或指令。在一些实施例中，数据库130可以包括大容量存储器、可移动存储器、易失性读写存储器、只读存储器(ROM)等或其任意组合。在一些实施例中，数据库130可以在云平台上实现。
在一些实施例中，数据库130可以与系统100中的至少一个其他组件(例如，处理器140)通信。系统100中的至少一个组件可以访问数据库130中存储的数据(例如，第一反馈路径传递函数)。在一些实施例中，数据库130可以是处理器140的一部分。
图2是根据本申请一些实施例所示的获取振动传递函数方法的示例性流程图。具体的，方法200可以由系统100(如，处理器140)执行。例如，方法200可以以程序或指令的形式存储在存储装置(如，数据库130)中，当系统100(如，处理器140)执行该程序或指令时，可以实现方法200。
步骤210，由测试信号生成单元141产生第一测试音信号和第二测试音信号。在一些实施例中，步骤210可以由测试音生成模块310执行。
在一些实施例中，测试信号生成单元141可以是能够产生并输出具有一定特征的电信号的信号源。例如，第一测试音信号或第二测试音信号包括白噪声信号、纯音信号、脉冲信号、窄带噪声、窄带啭音、调制音和/或扫频音信号。当发声装置(例如，骨传导扬声器122)接收到白噪声信号时，发声装置可以产生在所有频率具有相同能量密度的噪声，即白噪声。当发生装置接收到纯音信号时，发声装置可以产生单一音调的声音，即纯音。当发生装置接收到扫频音信号时，发声装置可以产生在同一频段内，频率由高到低(或由低到高)连续变化的声音，即扫频音。
在一些实施例中，第一测试音信号与第二测试音信号是由测试信号生成单元141在不同时间点先后产生并分别用于对待测设备进行测试的信号。在一些实施例中，为了保持前后两次测试条件的一致性，第一测试音信号与第二测试音信号可以完全相同，即第一测试音信号与第二测试音信号的类型和频率都相同。例如，第一测试音信号和第二测试音信号可以是完全相同的扫频信号。在一些实施例中，第一测试音信号与第二测试音信号的类型也可以不同。例如，第一测试音信号可以为白噪声，第二测试音信号可以为纯音。
在一些可替代的实施例中，对待测设备在第一测试音信号下的测试与在第二测试音信号下的测试可以被替换为一次性同时完成。此时，测试信号生成单元141可以只产生一种测试音信号，例如只产生第一测试音信号或者第二测试音信号，同样可以实现测试的目的，具体内容可以参见步骤230的相关描述。
步骤220，由骨传导扬声器122基于第一测试音信号和第二测试音信号， 分别产生第一声音和第二声音。
第一测试音信号和第二测试音信号可以通过电信号的形式传递至骨传导扬声器122，骨传导扬声器122可以将上述电信号分别转化成第一声音和第二声音。在一些实施例中，骨传导扬声器122可以包括振动板和换能器。换能器可以被配置为用于产生振动，例如通过将第一测试音信号和第二测试音信号对应的电信号转换为机械振动而产生振动。换能器可以驱动振动板振动。仅作为示例，振动板可以机械地连接到换能器并随换能器振动。在实际应用时(如，用户佩戴上听力设备120)，振动板可以接触用户的皮肤，并且将振动通过人体组织和骨骼传递到听觉神经，从而可以使用户听到声音。
在一些实施例中，骨传导扬声器122可以基于第一测试音信号和第二测试音信号依次产生第一声音和第二声音。例如，可以首先产生第一声音，待麦克风接收到第一声音并输出第一反馈信号后再产生第二声音。或者，也可以首先产生第二声音，待麦克风接收到第二声音并输出第二反馈信号后再产生第一声音。
在一些实施例中，第一声音和第二声音可以依次由同一骨传导扬声器122在同一听力设备120的同一位置产生。此时，通过改变麦克风的位置，即可以获得该骨传导扬声器122所发出的声音对不同位置的影响，从而获得对应不同声学路径的传递函数。在另一些实施例中，骨传导扬声器122可以包括两个结构和材质相同的骨传导扬声器122，两个骨传导扬声器122分别基于第一测试音信号和第二测试音信号依次产生第一声音和第二声音。
步骤230，由至少一个探测器分别在第一位置接收第一声音后输出第一反馈信号，以及在第二位置接收第二声音后输出第二反馈信号。
至少一个探测器可以分别接收第一声音和第二声音并基于第一声音和第二声音生成第一反馈信号和第二反馈信号，并将第一反馈信号和第二反馈信号发送给反馈路径测试设备(例如，反馈路径计算单元142)。
为方便描述，以下以至少一个探测器包括气导麦克风(例如，图4和图5 中的麦克风)为例进行说明。麦克风在所述第一位置可以接收到骨传导扬声器122通过第一种方式传递的第一声音。例如，骨传导扬声器122可以固定在听力设备120上(即，骨传导扬声器122与听力设备120刚性或弹性连接)，所述第一位置可以是紧靠听力设备120(如，图1或图4中壳体121)的另一位置。当麦克风位于所述第一位置时，麦克风与听力设备120刚性或弹性连接。根据骨传导扬声器122的发声原理可以得知，骨传导扬声器122在产生第一声音时会带动听力设备120(的壳体)振动，而听力设备120的振动会传递给紧靠听力设备120的麦克风。例如，如图4所示，第一位置可以是贴着听力设备120的壳体121的某一位置。假设壳体121的振动方向与麦克风的振膜的振动方向平行时，则壳体121振动的同时也会引起麦克风的振膜的振动。同时，骨传导扬声器122在产生第一声音时也会带动周围空气的振动，而空气的振动会以气传导的方式传递到麦克风。因此，第一声音会同时通过振动传导和气传导的方式传递到麦克风。也就是说，上述第一种方式包括振动传导和气传导。
在一些实施例中，麦克风可以基于通过上述两种传递路径传递的第一声音产生第一反馈信号，麦克风还可以将第一反馈信号发送给反馈路径计算单元142和/或存储到存储装置(例如，数据库130)中。
类似地，麦克风在所述第二位置可以接收到骨传导扬声器122通过第二种方式传递的第二声音。例如，第二位置可以不与听力设备120(的壳体121)接触但靠近所述第一位置。当麦克风位于所述第二位置时，可以认为麦克风相对于听力设备120悬空设置。可选地，所述第二位置可以位于听力设备120的(壳体)内部或外部，只要麦克风在该位置不与听力设备120刚性或弹性连接即可。例如，在图5中，由于麦克风在第二位置时不与壳体121接触，麦克风的振膜只会接收空气传递的声音，而不会受到壳体121振动的影响。因此，第二声音只会通过气传导的方式传递到麦克风。也就是说，上述第二种方式只包括气传导。在一些实施例中，麦克风可以基于通过气传导传递路径传递的第二声音产生第二反馈信号，麦克风还可以将第二反馈信号发送给反馈路径计算单 元142和/或存储到存储装置(例如数据库130)中。需要知道的是，当第二位置和第一位置之间的距离很小(例如，小于1mm，5mm，1cm，5cm)时，可以近似的认为骨传导扬声器122到第一位置的气传导路径与骨传导扬声器122到第二位置的气传导路径相同。
在一些可替代的实施例中，当麦克风处于第一位置且壳体121的振动方向与麦克风的振膜的振动方向垂直时，壳体121的振动也不会引起麦克风的振动部件(例如，振膜)的振动。此时，可以认为麦克风在第一位置处仍然只会接收空气传递的声音。因此，上述麦克风在脱离壳体121的第二位置接收第二声音的过程可以被替换为调整麦克风的朝向，使得麦克风在第一位置时振膜振动方向与壳体121振动方向垂直。由于振膜不受壳体121振动影响，即使麦克风贴着壳体121，但其接收到的第二声音也只会通过气传导传递。因此，当麦克风的振膜振动方向与壳体121振动方向垂直时，在计算反馈路径传递函数时只需要考虑气传导反馈路径传递函数。可以理解，当骨传导扬声器122分别产生第一声音和第二声音时，此时仅需要在第一位置，将麦克风的振膜振动方向分别设置成与壳体121的振动方向平行或垂直，麦克风也可根据接收到的第一声音和第二声音分别输出第一反馈信号和第二反馈信号。
在一些实施例中，至少一个探测器(如，气导麦克风或麦克风)也可以包括结构和材质相同的第一探测器(如，第一气导麦克风)和第二探测器(如，第二气导麦克风)。在一些实施例中，至少一个探测器(如，气导麦克风或麦克风)也可以包括结构和材质不同的第一探测器(如，硅麦克风)和第二探测器(如，驻极体麦克风)。在一些实施例中，麦克风可以是气导麦克风和骨导麦克风。为方便理解，在本申请中，麦克风可以为气导麦克风。在分别接收上述第一声音和第二声音时，第一探测器和第二探测器可以分别位于第一位置和第二位置，用于接收第一声音和第二声音。与前述实施例类似的，第一探测器接收到第一声音后可以输出第一反馈信号，第二探测器接收到第二声音后可以输出第二反馈信号。
在另一些实施例中，可以将第一探测器和第二探测器分别同时放置在第一位置和第二位置，第一探测器和第二探测器可以同时接收同一声音。例如，骨传导扬声器122只基于一个测试音信号(如，第一测试音信号)产生第一声音，第一探测器和第二探测器分别位于第一位置和第二位置并同时接收第一声音。在本实施例中，第一探测器和第二探测器虽然接收的是同一声音，但由于第一探测器接收的第一声音传递路径包括气传导传递路径和振动传递路径，而第二探测器接收的第一声音只包括气传导传递路径，因此第一探测器和第二探测器所输出的反馈信号不相同，为方便起见，第一探测器输出的反馈信号也可以称为第一反馈信号，第二探测器输出的反馈信号也可以称为第二反馈信号，且与前述实施例中，同一个探测器分别位于第一位置和第二位置后输出的第一反馈信号和第二反馈信号的差异较小，可认为是近似相同。
步骤240，反馈路径计算单元142基于第一测试音信号、第二测试音信号、第一反馈信号和第二反馈信号，确定骨传导扬声器122到第一位置的振动传递函数。在一些实施例中，步骤240可以由处理模块320执行。
在一些实施例中，当接收到来自麦克风输出的第一反馈信号和第二反馈信号后，反馈路径计算单元142可以通过反馈路径传递函数测定原理，基于第一测试音信号、第二测试音信号、第一反馈信号和第二反馈信号计算出反馈路径传递函数。在一些实施例中，反馈路径计算单元142可以从测试信号生成单元141中获取第一测试音信号。在一些实施例中，反馈路径计算单元142接收到第一测试音信号和第一反馈信号后，可以基于第一测试音信号和第一反馈信号计算第一声音从骨传导扬声器122传递到第一位置的第一反馈路径传递函数。例如，反馈路径计算单元142可以对第一测试音信号和第一反馈信号分别进行算法变换，得到第一测试音变换信号和第一反馈变换信号。在一些实施例中，反馈路径计算单元142可以采用Z变换对第一测试音信号和第一反馈变换信号进行变换处理。例如，骨传导扬声器122输入的第一测试音信号经过Z变换得到第一测试音变换信号，气导麦克风输出的第一反馈信号经过Z变换得到第一 反馈变换信号。在另一些实施例中，算法变换还可以包括傅里叶变换、拉普拉斯变换或线性预测编码器等语音模型求解法等。
在一些实施例中，传递函数测定方法可以包括但不限于互相关法、自适应估计法等。在一些实施例中，传递函数测定方法也可以是通过对声音信号和电信号行算法变换得到变换后的信号，再根据变换后的信号进行计算得到传递函数，具体内容可以参见公式(1)-(5)的计算方法。
出于说明的目的，反馈路径计算单元142可以基于第一测试变换信号和第一反馈变换信号，通过公式(1)得到第一反馈路径传递函数：
Figure PCTCN2020112328-appb-000001
其中，Y 1(z)为第一测试音变换信号，X 1(z)为第一反馈变换信号，F 1(z)为第一反馈路径传递函数。如前文所述，第一反馈路径传递函数F 1(z)包括骨传导扬声器122到第一位置之间的气传导传递路径和振动传递路径的影响。
在一些实施例中，反馈路径计算单元142可以从测试信号生成单元141中获取第二测试音信号。在一些实施例中，反馈路径计算单元142接收到第二测试音信号和第二反馈信号后，可以基于第二测试音信号和第二反馈信号计算第二声音从骨传导扬声器122传递到第二位置的第二反馈路径传递函数。例如，反馈路径计算单元142可以对第二测试音信号和第二反馈信号分别进行算法变换，得到第二测试音变换信号和第二反馈变换信号。在一些实施例中，反馈路径计算单元142可以采用Z变换对第二测试音信号和第二反馈信号进行变换处理。例如，骨传导扬声器122输入的第二测试音信号经过Z变换得到第二测试音变换信号，麦克风输出的第二反馈信号经过Z变换得到第二反馈变换信号。
类似的，出于说明的目的，反馈路径计算单元142可以基于第二测试音变换信号和第二反馈变换信号，通过公式(2)得到第二反馈路径传递函数：
Figure PCTCN2020112328-appb-000002
其中，Y 2(z)为第二测试音变换信号，X 2(z)为第二反馈变换信号，F 2(z)为 第二反馈路径传递函数。如前文所述，第二反馈路径传递函数F 2(z)仅包括骨传导扬声器122到第二位置(或第一位置)之间的气传导传递路径的影响。
通过上述公式(1)和公式(2)的计算，反馈路径计算单元142可以确定出通过气传导传递路径和振动传递路径传递的第一声音对应的第一反馈路径传递函数，以及确定出通过气传导传递路径传递的第二声音对应的第二反馈路径传递函数，再通过后续计算就能够确定出骨传导扬声器122到第一位置的振动传递函数。
在一些实施例中，反馈路径计算单元142可以基于第一反馈路径传递函数F 1(z)和第二反馈路径传递函数F 2(z)，确定骨传导扬声器122到第一位置的振动传递函数。
具体的，由于麦克风在第一位置接收到的第一声音的第一传递路径包括气传导传递路径和振动传递路径，麦克风在第二位置接收到的第二声音的第二传递路径只有气传导传递路径，从而导致气导麦克风两次的输出信号(即，第一反馈信号和第二反馈信号)不相同。
出于说明的目的，包括气传导路径和振动传递路径的第一反馈路径传递函数可以表示为：
F 1(z)＝A 1(z)+B 1(z)，        (3)
其中，A 1(z)为骨传导扬声器122到第一位置的气传导反馈路径传递函数，B 1(z)为骨传导扬声器122到第一位置的振动传递函数。
图6示出了通过公式(3)确定的第一反馈路径传递函数F 1(z)的曲线图。
在一些实施例中，考虑到第二位置与第一位置之间的距离很小，骨传导扬声器122到第二位置的气传导路径可以近似等同于骨传导扬声器122到第一位置的气传导路径。因此，只包括气传导路径的第二反馈路径传递函数可以表示为：
F 2(z)＝A 2(z)，        (4)
其中，A 2(z)为骨传导扬声器122到第二位置的气传导反馈路径传递函数， 其与骨传导扬声器122到第一位置的气传导反馈路径传递函数A 1(z)相同或近似相同。图7示出了公式(2)确定的第二反馈路径函数F 2(z)的曲线图。如前文所述，第二反馈路径传递函数F 2(z)仅包括骨传导扬声器122到第二位置(或第一位置)之间的气传导传递路径的影响。
在一些实施例中，反馈路径计算单元142可以基于第一反馈路径传递函数F 1(z)和第二反馈路径传递函数F 2(z)，确定骨传导扬声器122到第一位置的振动传递函数。具体的，由于第二反馈路径传递函数F 2(z)只包括气传导反馈路径传递函数A 1(z)，而第一反馈路径传递函数F 1(z)包括气传导反馈路径传递函数A 1(z)和振动传递函数B 1(z)，因此反馈路径计算单元142可以将公式(3)和公式(4)相减，计算得到振动传递函数B 1(z)：
B 1(z)＝F 1(z)-F 2(z)，        (5)
图6是包括气传导路径和振动传递路径的第一反馈路径传递函数的曲线图。图6中曲线表示在对应频率下，在第一位置接收到的第一声音中同时有气传导反馈路径和振动传递路径的情况。可以看出，在1000Hz附近的范围内(例如，600Hz-1000Hz)，骨传导扬声器同时通过气传导反馈路径和振动传递路径对第一位置的影响相对于其他频率范围产生一个低谷(即，此处可理解为影响较小)，在300Hz-400Hz以及2000Hz-3000Hz的范围内，骨传导扬声器同时通过气传导反馈路径和振动传递路径对第一位置的影响相对于其他频率范围产生一个峰值(即，此处可理解为影响较大)。
图7是仅包括气传导路径的第二反馈路径传递函数的曲线图。图7中曲线表示在对应频率下，在第二位置接收到的第二声音中仅有气传导反馈路径的情况。其中，当频率在0Hz-1000Hz范围内时，骨传导扬声器通过气传导反馈路径对第二位置的影响较小；当频率在1000Hz-3000Hz范围内时，骨传导扬声器通过气传导反馈路径对第二位置的影响较大。在一些实施例中，当用图6中的第一反馈路径传递函数减去图7中的第二反馈路径传递函数时，可以得到如图8所示的曲线。从图8中可以看出，振动传递路径对于频率在0Hz-1000Hz 的部分影响较大，对于频率在1000Hz以上的部分影响较小。结合图6，图7和图8，可以看出骨传导扬声器通过振动传递路径对第一位置的影响主要集中在较低的频率范围(例如，小于1000Hz)，而骨传导扬声器通过气传导传递路径对第一位置(或第二位置)的影响主要集中在较高的频率范围(例如，大于1000Hz)。
在一些实施例中，反馈路径计算单元142可以基于第一反馈信号和第二反馈信号，确定骨传导扬声器122到第一位置的振动反馈信号。
出于说明的目的，反馈路径计算单元142可以基于第一反馈信号和第二反馈信号，通过公式(6)得到振动反馈信号：
X d＝X 1-X 2，           (6)
其中，X 1为第一反馈信号，X 2为第二反馈信号，X d为振动反馈信号。
在一些实施例中，反馈路径计算单元142可以基于第一测试音信号、第二测试音信号和振动反馈信号，确定骨传导扬声器122到第一位置的振动传递函数。
在一些实施例中，反馈路径计算单元142可以对第一测试音信号、第二测试音信号和振动反馈信号分别进行算法变换，得到第一测试音变换信号、第二测试音变换信号和振动反馈变换信号。例如，对第一测试音信号Y 1进行Z算法变换得到第一测试音变换信号Y 1(z)，对第二测试音信号Y 2进行Z算法变换得到第二测试音变换信号Y 2(z)，对第二测试音信号X d进行Z算法变换得到第二测试音变换信号X d(z)。
在一些实施例中，反馈路径计算单元142可以基于第一测试音变换信号、第二测试音变换信号和振动反馈变换信号，确定发声单元到所述第一位置的第一反馈路径传递函数。具体的，反馈路径计算单元142可以对第一测试音变换信号和第二测试音变换信号进行求均值或加权平均值，得到测试音均值变换信号。
出于说明的目的，反馈路径计算单元142可以基于第一测试音变换信号和第二测试音变换信号，通过公式(7)得到测试音均值变换信号：
Y d(z)＝(Y 1(z)+Y 2(z))/2，           (7)
其中，Y 1(z)为第一测试音变换信号，Y 2(z)为第二测试音变换信号，Y d(z)为测试音均值变换信号。
在一些实施例中，反馈路径计算单元142可以基于测试音均值变换信号和振动反馈变换信号，得到骨传导扬声器122到第一位置的振动传递函数。
出于说明的目的，反馈路径计算单元142可以基于测试音均值变换信号和振动反馈变换信号，通过公式(8)得到骨传导扬声器122到第一位置的振动传递函数：
Figure PCTCN2020112328-appb-000003
其中，Y d(z)为测试音均值变换信号，X d(z)为振动反馈变换信号，B 1(z)为振动传递函数。
在一些实施例中，反馈路径计算单元142还可以对第一测试音信和第二测试音信号求平均值、加权平均值，得到测试音均值信号。对测试音均值信号和振动反馈信号进行算法变换，得到测试音均值变换信号和振动反馈变换信号。然后基于测试音均值变换信号和振动反馈变换信号，得到骨传导扬声器122到第一位置的振动传递函数。
应该注意的是，上述描述仅出于说明性目的而提供，并不旨在限制本申请的范围。对于本领域普通技术人员而言，在本申请内容的指导下，可做出多种变化和修改。可以以各种方式组合本申请描述的示例性实施例的特征、结构、方法和其他特征，以获得另外的和/或替代的示例性实施例。例如，反馈路径计算单元142可以包括第一计算单元和第二计算单元，第一计算单元可以用于计算第一反馈路径的第一反馈路径传递函数，第二计算单元可以用于计算第二反馈路径传递函数。然而，这些变化与修改不会背离本申请的范围。
图3是根据本申请一些实施例所示的获取振动传递函数系统的示例性模块图。获取振动传递函数系统300可以简称为系统300。如图3所示，该系统300可以包括测试音生成模块310和处理模块320。在一些实施例中，该系统300 可以由图1中所示的系统100(如，处理器140)实现。
测试音生成模块310可以用于产生第一测试音信号和第二测试音信号。在一些实施例中，第一测试音信号或第二测试音信号可以包括白噪声信号、纯音信号、脉冲信号、窄带噪声、窄带啭音、调制音和/或扫频音信号中至少一种。在一些实施例中，第一测试音信号与第二测试音信号的类型和频率相同，例如，第一测试音信号和第二测试音信号可以是同一频率的纯音信号。在一些实施例中，第一测试音信号与第二测试音信号的类型也可以不同。例如，第一测试音信号可以为白噪声，第二测试音信号可以为纯音。在一些实施例中，测试音生成模块310可以只产生一种测试音信号，例如只产生第一测试音信号或者第二测试音信号，同样可以实现获取振动传递函数的目的，具体内容可以参见步骤230的相关描述。
处理模块320可以用于基于第一测试音信号、第二测试音信号、第一反馈信号和第二反馈信号，确定骨传导扬声器122到第一位置的振动传递函数，第一反馈信号反映从骨传导扬声器122通过振动传递路径和气传导传递路径传递到第一位置的信号，第二反馈信号反映从骨传导扬声器122通过气传导传递路径传递到第二位置的信号。其中，第一反馈信号和第二反馈信号可以由至少一个麦克风分别在第一位置接收第一声音后输出以及在第二位置接收第二声音后输出；第一声音和第二声音可以由骨传导扬声器122分别基于第一测试音信号和第二测试音信号产生。关于基于第一测试音信号和第二测试音信号产生第一声音和第二声音的更多内容请参见步骤220的详细描述，在此不作赘述。
在一些实施例中，处理模块320接收到第一测试音信号后，可以基于第一测试音信号和第一反馈信号计算第一声音从骨导扬声器122传递到第一位置的第一反馈路径传递函数。关于计算第一反馈路径传递函数的更多内容请参见图2中步骤240的详细描述，在此不作赘述。
在一些实施例中，处理模块320还可以基于第二测试音信号和第二反馈信号计算第二声音从骨导扬声器122传递到第二位置的第二反馈路径传递函数。 关于计算第二反馈路径传递函数的更多内容请参见图2中步骤240的详细描述，在此不作赘述。
在一些实施例中，处理模块320可以基于第一反馈路径传递函数和第二反馈路径传递函数，确定骨传导扬声器122到第一位置的振动传递函数。关于确定骨传导扬声器122到第一位置的振动传递函数的更多内容请参见图2中步骤240的详细描述，在此不作赘述。
在一些实施例中，处理模块320可以基于第一反馈信号和第二反馈信号，确定骨传导扬声器122到第一位置的振动反馈信号。在一些实施例中，处理模块320还可以基于第一测试音信号、第二测试音信号和振动反馈信号，确定骨传导扬声器122到第一位置的振动传递函数。关于确定骨传导扬声器122到第一位置的振动传递函数的更多内容请参见图2中步骤240的详细描述，在此不作赘述。
应该注意的是，上述描述仅出于说明性目的而提供，并不旨在限制本申请的范围。对于本领域普通技术人员而言，在本申请内容的指导下，可做出多种变化和修改。可以以各种方式组合本申请描述的示例性实施例的特征、结构、方法和其他特征，以获得另外的和/或替代的示例性实施例。例如，处理模块320可以包括第一处理模块和第二处理模块，第一处理模块可以用于计算第一反馈路径的第一反馈路径传递函数，第二处理模块可以用于计算第二反馈路径传递函数。然而，这些变化与修改不会背离本申请的范围。
在本申请的另一些实施例中，提供了一种计算机可读存储介质，包括至少一个处理器140以及至少一个数据库130；至少一个数据库130用于存储计算机指令，至少一个处理器140用于执行计算机指令中的至少部分指令以实现如上的方法200。
在本申请的另一些实施例中，还提供一种检测骨导听力设备状态的方法。图9是根据本申请一些实施例所示的检测骨导听力设备状态的方法的示例性流程图。所述骨导听力设备可以至少包括麦克风、扬声器、反馈分析单元和信号 处理单元。在一些实施例中，本实施例中的麦克风可以包括骨导麦克风、气导麦克风等，上述麦克风都属于本申请其他实施例中所披露的探测器，例如，可以是图4和图5中所示的麦克风。本实施例中的扬声器为骨传导扬声器，与前述实施例中的骨传导扬声器122可以相同，也可以不同，但都可以用于将电信号转变为振动信号。所述麦克风和骨传导扬声器分别安装在骨导听力设备的不同位置。例如，所述麦克风和扬声器分别固定在骨导听力设备的壳体上的不同位置。在一些实施例中，反馈分析单元和信号处理单元可以是两个单独的装置，也可以是一个装置中实现两种不同功能的部件。例如，反馈分析单元和信号处理单元可以组合成一个状态检测设备。可以理解的是，状态检测设备可以与上述麦克风、扬声器组合形成一个整体装置，也可以是与上述麦克风、扬声器独立设置的装置。为了区别上述两种设置方式，下面将以两个应用场景进行说明：例如，当状态监测设备与上述麦克风、扬声器组合形成一个整体装置时，该骨导听力设备在使用前或使用时可以实现状态自检测，检测是否处于正常状态或异常状态，异常状态包括佩戴不正确、骨导听力设备结构异常、异物侵入、异物遮挡中一个或多个。又例如，当状态检测设备与上述麦克风、扬声器独立设置时，该骨导听力设备在使用前或使用时可以与检测设备进行通信和/或连接以对该骨导听力设备进行状态检测，检测该骨导听力设备是否处于正常状态或异常状态，异常状态包括佩戴不正确、骨导听力设备结构异常、异物侵入、异物遮挡中一个或多个。
检测骨导听力设备状态的方法可以包括以下步骤：
步骤910，由扬声器基于第一信号产生第三声音。在一些实施例中，所述第一信号可以类似上述第一测试音信号或第二测试音信号，在此不做赘述。在一些实施例中，步骤910可以由声音产生模块1010执行。
在一些实施例中，可以通过信号处理单元产生测第一信号(即，试音信号)，该第一信号可以传递至扬声器中，扬声器可以将第一信号转换为第三声音。
步骤920，由麦克风接收第三声音并产生反馈信号。在一些实施例中，步骤920可以由反馈信号产生模块1020执行。
扬声器产生的声音会被麦克风接收，并产生相应的反馈信息。在一些实施例中，麦克风接收到第三声音后，可以基于第三声音产生反馈信号，并将反馈信号发送给反馈分析单元。在一些实施例中，麦克风可以采取与前述实施例中产生第一反馈信号相似或相同的方式产生反馈信号。
步骤930，由反馈分析单元基于麦克风的反馈信号和第一信号，确定骨导听力设备的扬声器到麦克风的反馈路径传递函数。步骤930可以由反馈分析模块1030执行。
在一些实施例中，确定骨导听力设备的扬声器到麦克风的反馈路径传递函数的方法可以与图2中确定第一反馈路径传递函数F 1(z)和/或第二反馈路径传递函数F 2(z)的方法相同。出于说明的目的，可以通过公式(9)确定骨导听力设备的扬声器到麦克风的反馈路径传递函数F 3(z)：
Figure PCTCN2020112328-appb-000004
其中，Y 3(z)表示骨导听力设备输入的第一信号经过Z变换得到的第一变换信号，X 3(z)表示麦克风输出的反馈信号经过Z变换得到的反馈变换信号。
通过将第一信号和反馈信号进行Z变换，可以相应得到第一变换信号Y 3(z)和反馈变换信号X 3(z)。因此，通过公式(9)即可确定骨导听力设备的扬声器到麦克风的反馈路径传递函数。
步骤940，获取至少一个预设反馈路径传递函数。步骤940可以由反馈分析模块1030执行。
预设反馈路径传递函数可以理解为预先设定或者预先存储在存储装置(例如，数据库130)中的反馈路径传递函数。在一些实施例中，预设反馈路径传递函数可以包括根据本申请其他实施例(例如步骤240)披露的方法确定的反馈路径传递函数，例如，第一反馈路径传递函数。在一些实施例中，预设反馈路径传递函数也可以是操作人员根据经验手动设定的反馈路径传递函数。在一 些实施例中，至少一个预设反馈路径传递函数可以包括标准反馈路径传递函数或异常反馈路径传递函数中至少一个。其中，标准反馈路径传递函数可以是指骨导听力设备处于正常状态下所对应的反馈路径传递函数。例如，标准反馈路径传递函数可以反映该骨导听力设备在大范围人群佩戴时的反馈路径特征函数，也可以是某一特定用户在正常佩戴且正常使用时的个性化反馈路径特征函数。异常反馈路径传递函数可以是指骨导听力设备处于异常状态下所对应的反馈路径传递函数。异常反馈路径传递函数包括佩戴不正确反馈路径传递函数、骨导听力设备结构异常反馈路径传递函数、异物侵入反馈路径传递函数、异物遮挡反馈路径传递函数中一个或多个。在一些实施例中，异常反馈路径可以包括多种可能发生的异常反馈情况。在一些实施例中，至少一个预设反馈路径传递函数可以包括骨导听力设备在不同状态时扬声器到麦克风的反馈路径传递函数。所述骨导听力设备的不同佩戴状态可以包括被用户佩戴时的状态(此时骨导听力设备的扬声器或者壳体与用户的脸部贴合)和没有被用户佩戴的状态(此时骨导听力设备的扬声器或者壳体未与用户的脸部贴合)。相应地，至少一个预设反馈路径传递函数可以包括骨导听力设备被用户佩戴时的反馈路径传递函数(也可以称为“第一预设反馈路径传递函数”)和未被用户佩戴时的反馈路径传递函数(也可以称为“第二预设反馈路径传递函数”)。
步骤950，比较反馈路径传递函数和至少一个预设反馈路径传递函数。步骤950可以由反馈分析模块1030执行。
在一些实施例中，可以将步骤930所确定的反馈路径传递函数与预设反馈路径传递函数进行比较，以确定骨导听力设备的状态。在一些实施例中，可以确定反馈路径传递函数与至少一个预设反馈路径传递函数中的标准反馈函数的差值是否在预设阈值范围内：若是，则确定反馈路径传递函数正常；若否，则确定反馈路径传递函数异常。在另一些实施例中，还可以确定反馈路径传递函数与至少一个预设反馈路径传递函数中的标准反馈函数的比值是否在预设阈值范围内，若是，则确定反馈路径传递函数正常；若否，则确定反馈路径传递 函数异常。在一些实施例中，可以确定反馈路径传递函数与至少一个预设反馈路径传递函数中的异常反馈函数的差值是否在预设阈值范围内：若是，则确定反馈路径传递函数异常；若否，则确定反馈路径传递函数正常。在另一些实施例中，还可以确定反馈路径传递函数与至少一个预设反馈路径传递函数中的异常反馈函数的比值是否在预设阈值范围内，若是，则确定反馈路径传递函数异常；若否，则确定反馈路径传递函数正常。在一些实施例中，上述预设阈值范围可以人为设定，并可以根据不同情况进行调整，本申请对此不作限制。
在一些实施例中，若至少一个预设反馈路径传递函数包括至少两个，则确定与反馈路径传递函数的差值最小的预设反馈路径传递函数作为预设反馈路径传递函数。例如，至少一个预设反馈路径传递函数包括第一预设反馈路径传递函数和第二预设反馈路径传递函数，第一预设反馈路径传递函数与反馈路径传递函数的差值大于第二预设反馈路径传递函数与反馈路径传递函数的差值，则确定第二预设反馈路径传递函数为预设反馈路径传递函数。
步骤960，由信号处理单元根据比较结果，确定骨导听力设备的状态。步骤960可以由信号处理模块1040执行。
在一些实施例中，比较结果可以包括反馈路径传递函数正常或异常。在一些实施例中，若反馈路径传递函数正常，则确定骨导听力设备的状态正常；若反馈路径传递函数异常，则确定骨导听力设备的状态异常。在一些实施例中，骨导听力设备的状态可以包括：正常状态、异常状态，异常状态包括佩戴不正确、骨导听力设备结构异常、异物侵入、异物遮挡中一个或多个。其中，佩戴状态可以理解为骨导听力设备佩戴在佩戴者身体上；不佩戴状态可以理解为骨导听力设备不佩戴在佩戴者身体上；结构正常状态可以是指骨导听力设备的结构和/或组件处于正常工作状态，使得骨导听力设备可以正常使用；结构异常状态则与结构正常状态相反，表示骨导听力设备的结构和/或组件没有处于正常工作状态(例如，由于碰撞导致骨导听力设备上组件的错位、移动、破损)；异物入侵状态可以是指有除骨导听力设备的结构和/或组件之外的其他物体进入到 骨导听力设备内部。在一些实施例中，可以将结构正常状态分类为正常状态，结构异常状态、异物入侵状态可以分类为异常状态。在一些其它的实施例中，比较结果可以反映骨导听音设备的佩戴状态，例如，佩戴状态、不佩戴状态。
在一些实施例中，可以通过图2中的方法分别确定正常状态下(例如，结构正常状态)和异常状态(例如，异物入侵状态)下的骨导听力设备的反馈路径传递函数，并将其存储在数据库130中作为预设反馈路径传递函数。在一些实施例中，可以将预设反馈路径传递函数中的对应于异常状态(例如，异物入侵状态)下的骨导听力设备的反馈路径传递函数作为异常反馈路径传递函数，将对应于正常状态(例如，结构正常状态)下的骨导听力设备的反馈路径传递函数作为标准反馈路径传递函数。在一些实施例中，数据库130中可以存储多个预设反馈路径传递函数，且每个预设反馈路径传递函数都对应一个骨导听力设备的状态(正常状态、异常状态)。根据步骤950和960，通过当前的骨导听力设备的反馈路径传递函数与数据库130中预设反馈路径传递函数的比较，可以匹配出数据库130中与当前的骨导听力设备的反馈路径传递函数最接近的预设反馈路径传递函数，则所述与之匹配的预设反馈路径传递函数所对应的骨导听力设备的状态即为该骨导听力设备的当前状态。因此，根据以上描述的过程，可以实时确定骨导听力设备的当前状态。
在一些实施例中，比较结果可以包括识别预设反馈路径传递函数的不同分类，进而可以确定骨导听力设备的不同状态。在一些实施例中，预设反馈路径传递函数的类型可以包括标准反馈路径传递函数、异常反馈路径传递函数；异常反馈路径传递函数包括佩戴不正确反馈路径传递函数、骨导听力设备结构异常反馈路径传递函数、异物侵入反馈路径传递函数、异物遮挡反馈路径传递函数中一个或多个。根据与反馈路径传递函数在预设阈值范围内的预设反馈路径传递函数的类型，可以确定所述反馈路径传递函数的类型，进而确定骨导听力设备的不同状态。例如，如果确定得到的预设反馈路径传递函数的类型对应贴合紧密(即骨导听力设备与用户贴合紧密)，则反馈路径传递函数的类型也 对应贴合紧密，相应的，可以反映骨导听力设备与用户贴合紧密。又例如，如果确定得到的预设反馈路径传递函数的类型对应贴合不紧密，则反馈路径传递函数的类型也对应贴合不紧密，相应的，可以反映骨导听力设备与用户贴合不紧密。又例如，不同的预设反馈路径传递函数会对应骨导听力设备所佩戴的不同的头部部位。如果确定得到的预设反馈路径传递函数的类型对应佩戴在头部某一部位(例如，乳突处、颞骨处或前额处)，则反馈路径传递函数的类型也对应该头部部位，相应的，可以反映用户所佩戴骨导听力在头部的位置(例如，乳突处、颞骨处或前额处)。
在一些实施例中，确定骨导听力设备的状态后，信号处理模块1040可以针对上述状态，自适应调整骨导听力设备的参数。在一些实施例中，确定骨导听力设备的状态后，信号处理模块1040还可以针对上述状态，给用户发送提醒信息。在一些实施例中，若骨导听力设备的状态异常，则提醒用户对骨导听力设备的状态进行调整。在一些实施例中，提醒用户的方式可以包括但不限于语音提示、提示灯提示、震动提示、文本提示、远程消息等。具体的，语音提示可以是骨导听力设备发出的语音信息，例如，“设备中有异物入侵”。提示灯提示可以是指骨导听力设备上设置有提示灯，当骨导听力设备的状态正常时，显示绿灯，当骨导听力设备的状态异常时，显示红灯，以此来提醒佩戴者。震动提示可以是指当骨导听力设备的状态异常时，骨导听力设备会产生震动，例如，震动3次，表示有结构异常；持续震动，表示有异物入侵。文本提示可以是指骨导听力设备或与骨导听力设备通信和/或连接的终端上显示用以提醒用户的文字信息，例如“设备中有异物入侵”、“设备中结构异常”。
应该注意的是，上述描述仅出于说明性目的而提供，并不旨在限制本申请的范围。对于本领域普通技术人员而言，在本申请内容的指导下，可做出多种变化和修改。可以以各种方式组合本申请描述的示例性实施例的特征、结构、方法和其他特征，以获得另外的和/或替代的示例性实施例。例如，骨导听力设备的状态包括多种，但哪些状态属于正常状态，哪些状态属于异常状态可以由 操作人员根据经验进行设定，也可以由用户自行设定，还可以由信号处理模块1040进行设定。然而，这些变化与修改不会背离本申请的范围。
图10是根据本申请一些实施例所示的检测骨导听力设备状态的系统的示例性模块图。骨导听力设备状态的检测系统1000可以简称为系统1000。如图10所示，在一些实施例中，系统1000包括声音产生模块1010、反馈信号产生模块1020、反馈分析模块1030和信号处理模块1040。
声音产生模块1010可以用于基于第一信号产生第三声音；其中，第一信号由信号处理单元产生。在一些实施例中，声音产生模块1010可以是骨传导扬声器，或者是骨传导扬声器的一部分。关于基于第一信号产生第三声音的更多内容请参见图9中的详细描述，在此不作赘述。
反馈信号产生模块1020可以用于接收第三声音并产生反馈信号。在一些实施例中，反馈信号产生模块1020可以是麦克风，或者是麦克风的一部分，也可以是任何声电传感器或振动传感器。关于产生反馈信号的更多内容请参见图9中的详细描述，在此不作赘述。
反馈分析模块1030可以用于基于反馈信号和第一信号，确定骨导听力设备的扬声器到麦克风的反馈路径传递函数；反馈分析模块也可以用于获取至少一个预设反馈路径传递函数；此外，反馈分析模块还可以用于比较反馈路径传递函数和至少一个预设反馈路径传递函数。关于确定反馈路径传递函数、比较反馈路径传递函数和至少一个预设反馈路径传递函数的更多内容请参见图9中的详细描述，在此不作赘述。
信号处理模块1040可以用于根据比较结果，确定骨导听力设备的状态。关于确定骨导听力设备的状态的更多内容请参见图9中的详细描述，在此不作赘述。
在本申请的另一些实施例中，还提供一种计算机可读存储介质，存储介质存储计算机指令，当计算机读取存储介质中的计算机指令后，计算机执行：基于第一信号产生第三声音；其中，第一信号可以为计算机产生的测试信号； 接收第三声音并产生反馈信号；基于反馈信号和第一信号，确定骨导听力设备的扬声器到麦克风的反馈路径传递函数；获取至少一个预设反馈路径传递函数；比较反馈路径传递函数和至少一个预设反馈路径传递函数；根据比较结果，确定骨导听力设备的状态。
需要注意的是，以上对于系统及其装置/模块的描述，仅为描述方便，并不能把本申请限制在所举实施例范围之内。可以理解，对于本领域的技术人员来说，在了解该系统的原理后，可能在不背离这一原理的情况下，对各个装置/模块进行任意组合，或者构成子系统与其他装置/模块连接。例如，图10中披露的反馈分析模块1030和信号处理模块1040可以是一个装置(例如，处理器140)中的不同模块，也可以是一个模块实现上述的两个或两个以上模块的功能。例如，反馈分析模块1030和信号处理模块1040可以是两个模块，也可以是一个模块同时具有分析信号和处理信号的功能。又例如，各个模块可以分别具有各自的存储模块。再例如，各个模块可以共用一个存储模块。以诸如此类的变形，均在本申请的保护范围之内。
本申请实施例可能带来的有益效果包括但不限于：(1)无需使用加速度计等外部器件即可测得骨导扬声器的振动传递函数，使测试过程更加简单、便捷；(2)能够根据反馈路径传递函数检测当前骨导听力设备的状态，并根据骨导听力设备的状态发送相应提醒给用户，使用户知晓或调整骨导听力设备的状态，从而提高用户体验。需要说明的是，不同实施例可能产生的有益效果不同，在不同的实施例里，可能产生的有益效果可以是以上任意一种或几种的组合，也可以是其他任何可能获得的有益效果。
上文已对基本概念做了描述，显然，对于本领域技术人员来说，上述详细披露仅仅作为示例，而并不构成对本申请的限定。虽然此处并没有明确说明，本领域技术人员可能会对本申请进行各种修改、改进和修正。该类修改、改进和修正在本申请中被建议，所以该类修改、改进、修正仍属于本申请示范实施例的精神和范围。
同时，本申请使用了特定词语来描述本申请的实施例。如“一个实施例”、“一实施例”、和/或“一些实施例”意指与本申请至少一个实施例相关的某一特征、结构或特点。因此，应强调并注意的是，本申请中在不同位置两次或多次提及的“一实施例”或“一个实施例”或“一个替代性实施例”并不一定是指同一实施例。此外，本申请的一个或多个实施例中的某些特征、结构或特点可以进行适当的组合。
此外，除非权利要求中明确说明，本申请所述处理元素和序列的顺序、数字字母的使用、或其他名称的使用，并非用于限定本申请流程和方法的顺序。尽管上述披露中通过各种示例讨论了一些目前认为有用的发明实施例，但应当理解的是，该类细节仅起到说明的目的，附加的权利要求并不仅限于披露的实施例，相反，权利要求旨在覆盖所有符合本申请实施例实质和范围的修正和等价组合。例如，虽然以上所描述的系统组件可以通过硬件设备实现，但是也可以只通过软件的解决方案得以实现，如在现有的服务器或移动设备上安装所描述的系统。
同理，应当注意的是，为了简化本申请披露的表述，从而帮助对一个或多个发明实施例的理解，前文对本申请实施例的描述中，有时会将多种特征归并至一个实施例、附图或对其的描述中。但是，这种披露方法并不意味着本申请对象所需要的特征比权利要求中提及的特征多。实际上，实施例的特征要少于上述披露的单个实施例的全部特征。
最后，应当理解的是，本申请中所述实施例仅用以说明本申请实施例的原则。其他的变形也可能属于本申请的范围。因此，作为示例而非限制，本申请实施例的替代配置可视为与本申请的教导一致。相应地，本申请的实施例不仅限于本申请明确介绍和描述的实施例。

Claims (16)

  1. 一种检测骨导听力设备状态的方法，其中，所述骨导听力设备至少包括麦克风、扬声器、反馈分析单元和信号处理单元，所述方法包括：
    由所述扬声器基于第一信号产生第三声音；其中，所述第一信号由所述信号处理单元产生；
    由所述麦克风接收所述第三声音并产生反馈信号；
    由所述反馈分析单元基于所述麦克风的反馈信号和所述第一信号，确定所述骨导听力设备的所述扬声器到所述麦克风的反馈路径传递函数；
    获取至少一个预设反馈路径传递函数；
    比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数；
    由所述信号处理单元根据比较结果，确定所述骨导听力设备的状态。
  2. 根据权利要求2所述的方法，其中，所述至少一个预设反馈路径传递函数包括标准反馈路径传递函数、异常反馈路径传递函数；异常反馈路径传递函数包括佩戴不正确反馈路径传递函数、骨导听力设备结构异常反馈路径传递函数、异物侵入反馈路径传递函数、异物遮挡反馈路径传递函数中一个或多个；
    所述比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数包括：
    确定与所述反馈路径传递函数在预设阈值范围内的所述至少一个预设反馈路径传递函数；
    基于所述至少一个预设反馈路径传递函数的类型，确定所述反馈路径传递函数的类型。
  3. 根据权利要求2所述的方法，其中，基于所述至少一个预设反馈路径传递函数的类型，确定所述反馈路径传递函数的类型包括：
    若所述至少一个预设反馈路径传递函数的类型为标准反馈路径传递函数，则确定所述反馈路径传递函数的类型正常；或者
    若所述至少一个预设反馈路径传递函数的类型为异常反馈路径传递函数，则确定所述反馈路径传递函数的异常类型；进一步包括：
    若所述至少一个预设反馈路径传递函数的类型为佩戴不正确反馈路径传递函数，则确定所述反馈路径传递函数的类型为佩戴不正确；或者
    若所述至少一个预设反馈路径传递函数的类型为骨导听力设备结构异常反馈路径传递函数，则确定所述反馈路径传递函数的类型为骨导听力设备结构异常；或者
    若所述至少一个预设反馈路径传递函数的类型为异物侵入反馈路径传递函数，则确定所述反馈路径传递函数的类型为异物侵入；或者
    若所述至少一个预设反馈路径传递函数的类型为异物遮挡反馈路径传递函数，则确定所述反馈路径传递函数的类型为异物遮挡。
  4. 根据权利要求2所述的方法，其中，所述确定与所述反馈路径传递函数在预设阈值范围内的所述至少一个预设反馈路径传递函数包括：
    若所述至少一个预设反馈路径传递函数包括至少两个，则确定差值最小的预设反馈路径传递函数为所述预设反馈路径传递函数。
  5. 根据权利要求3所述的方法，其中，所述根据比较结果，确定所述骨导听力设备的状态包括：
    若所述反馈路径传递函数的类型为正常，则确定所述骨导听力设备的状态正常；或者
    若所述反馈路径传递函数的类型为异常，则确定所述骨导听力设备的状态异常；进一步包括确定所述骨导听力设备的异常类型：
    若所述反馈路径传递函数的类型为佩戴不正确，则确定所述骨导听力设备的状态为佩戴不正确；或者
    若所述反馈路径传递函数的类型为骨导听力设备结构异常，则确定所述 骨导听力设备的状态为结构异常；或者
    若所述反馈路径传递函数的类型为异物侵入，则确定所述骨导听力设备的状态为异物侵入；或者
    若所述反馈路径传递函数的类型为异物遮挡，则确定所述骨导听力设备的状态为异物遮挡。
  6. 根据权利要求1所述的方法，其中，所述方法还包括：
    根据所述骨导听力设备的状态，自适应调整所述骨导听力设备的参数或发送提醒信息给用户。
  7. 根据权利要求1所述的方法，其中，所述骨导听力设备的状态包括正常状态、异常状态；异常状态包括佩戴不正确、骨导听力设备结构异常、异物侵入、异物遮挡中一个或多个。
  8. 一种检测骨导听力设备状态的系统，其中，所述骨导听力设备至少包括麦克风、扬声器、反馈分析单元和信号处理单元，所述系统包括：
    所述扬声器被配置为基于第一信号产生第三声音；其中，所述第一信号由所述信号处理单元产生；
    所述麦克风被配置为接收所述第三声音并产生反馈信号；
    所述反馈分析单元被配置为基于所述麦克风的反馈信号和所述第一信号，确定所述骨导听力设备的所述扬声器到所述麦克风的反馈路径传递函数；
    获取至少一个预设反馈路径传递函数；
    比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数；
    所述信号处理单元被配置为根据比较结果，确定所述骨导听力设备的状态。
  9. 根据权利要求8所述的系统，其中，所述至少一个预设反馈路径传递函数包括标准反馈路径传递函数、异常反馈路径传递函数；异常反馈路径传递函 数包括佩戴不正确反馈路径传递函数、骨导听力设备结构异常反馈路径传递函数、异物侵入反馈路径传递函数、异物遮挡反馈路径传递函数中一个或多个；
    所述比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数包括：
    确定与所述反馈路径传递函数在预设阈值范围内的所述至少一个预设反馈路径传递函数；
    基于所述至少一个预设反馈路径传递函数的类型，确定所述反馈路径传递函数的类型。
  10. 根据权利要求9所述的系统，其中，基于所述至少一个预设反馈路径传递函数的类型，确定所述反馈路径传递函数的类型包括：
    若所述至少一个预设反馈路径传递函数的类型为标准反馈路径传递函数，则确定所述反馈路径传递函数的类型正常；或者
    若所述至少一个预设反馈路径传递函数的类型为异常反馈路径传递函数，则确定所述反馈路径传递函数的异常类型；进一步包括：
    若所述至少一个预设反馈路径传递函数的类型为佩戴不正确反馈路径传递函数，则确定所述反馈路径传递函数的类型为佩戴不正确；或者
    若所述至少一个预设反馈路径传递函数的类型为骨导听力设备结构异常反馈路径传递函数，则确定所述反馈路径传递函数的类型为骨导听力设备结构异常；或者
    若所述至少一个预设反馈路径传递函数的类型为异物侵入反馈路径传递函数，则确定所述反馈路径传递函数的类型为异物侵入；或者
    若所述至少一个预设反馈路径传递函数的类型为异物遮挡反馈路径传递函数，则确定所述反馈路径传递函数的类型为异物遮挡。
  11. 根据权利要求9所述的系统，其中，所述确定所述反馈路径传递函数 在预设阈值范围内的所述至少一个预设反馈路径传递函数包括：
    若所述至少一个预设反馈路径传递函数包括至少两个，则确定差值最小的预设反馈路径传递函数为所述预设反馈路径传递函数。
  12. 根据权利要求10所述的系统，其中，所述根据比较结果，确定所述骨导听力设备的状态包括：
    若所述反馈路径传递函数的类型为正常，则确定所述骨导听力设备的状态正常；或者
    若所述反馈路径传递函数的类型为异常，则确定所述骨导听力设备的状态异常；进一步包括确定所述骨导听力设备的异常类型：
    若所述反馈路径传递函数的类型为佩戴不正确，则确定所述骨导听力设备的状态为佩戴不正确；或者
    若所述反馈路径传递函数的类型为骨导听力设备结构异常，则确定所述骨导听力设备的状态为结构异常；或者
    若所述反馈路径传递函数的类型为异物侵入，则确定所述骨导听力设备的状态为异物侵入；或者
    若所述反馈路径传递函数的类型为异物遮挡，则确定所述骨导听力设备的状态为异物遮挡。
  13. 根据权利要求12所述的系统，其中，所述信号处理单元被配置为：
    根据所述骨导听力设备的状态，自适应调整所述骨导听力设备的参数或发送提醒信息给用户。
  14. 根据权利要求8所述的系统，其中，所述骨导听力设备的状态包括正常状态、异常状态；异常状态包括佩戴不正确、骨导听力设备结构异常、异物侵入、异物遮挡中一个或多个。
  15. 一种检测骨导听力设备状态的系统，其中，所述系统包括声音产生模块、反馈信号产生模块、反馈分析模块和信号处理模块；其中：
    所述声音产生模块，用于基于第一信号产生第三声音；其中，所述第一信号由所述信号处理单元产生；
    所述反馈信号产生模块，用于接收所述第三声音并产生反馈信号；
    所述反馈分析模块，用于基于所述反馈信号和所述第一信号，确定所述骨导听力设备的扬声器到麦克风的反馈路径传递函数；
    获取至少一个预设反馈路径传递函数；
    比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数；
    所述信号处理模块，用于根据比较结果，确定所述骨导听力设备的状态。
  16. 一种计算机可读存储介质，其特征在于，所述存储介质存储计算机指令，当计算机读取所述存储介质中的所述计算机指令后，所述计算机执行：
    基于第一信号产生第三声音；其中，所述第一信号为所述计算机产生的测试信号；
    接收所述第三声音并产生反馈信号；
    基于所述反馈信号和所述第一信号，确定所述骨导听力设备的所述扬声器到所述麦克风的反馈路径传递函数；
    获取至少一个预设反馈路径传递函数；
    比较所述反馈路径传递函数和所述至少一个预设反馈路径传递函数；
    根据比较结果，确定所述骨导听力设备的状态。
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