WO2022016511A1 - Procédé et appareil d'annulation active du bruit - Google Patents

Procédé et appareil d'annulation active du bruit Download PDF

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Publication number
WO2022016511A1
WO2022016511A1 PCT/CN2020/104467 CN2020104467W WO2022016511A1 WO 2022016511 A1 WO2022016511 A1 WO 2022016511A1 CN 2020104467 W CN2020104467 W CN 2020104467W WO 2022016511 A1 WO2022016511 A1 WO 2022016511A1
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Prior art keywords
signal
noise reduction
active noise
acoustic
error
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PCT/CN2020/104467
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English (en)
Chinese (zh)
Inventor
张立斌
袁庭球
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202080006822.4A priority Critical patent/CN114467311A/zh
Priority to PCT/CN2020/104467 priority patent/WO2022016511A1/fr
Publication of WO2022016511A1 publication Critical patent/WO2022016511A1/fr
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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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers

Definitions

  • the present application relates to the field of active noise reduction, and in particular, to a method and device for active noise reduction.
  • Active noise cancellation is based on the principle of superposition of sound waves, and noise removal is achieved by cancelling each other of sound waves.
  • Active noise reduction systems include feedforward and feedback.
  • the feedback-type active noise reduction system achieves the purpose of noise reduction through feedback. Specifically, an error sensor is used to collect the error signal after the noise reduction signal and the noise signal are superimposed, and a more accurate noise reduction signal is generated according to the error signal. .
  • the error sensor In the existing feedback active noise reduction headphones, the error sensor is usually located at the mouth of the external auditory canal, and there may be a problem that the error signal collected by the error sensor cannot well represent the real noise reduction effect perceived by the human ear, which makes the collected error The signal is not accurate enough, which affects the effect of Active Noise Cancellation.
  • the present application provides a method and device for active noise reduction.
  • the error signal in the feedback active noise reduction system can better represent the real noise reduction effect perceived by the human ear. , which can enhance the effect of Active Noise Cancellation.
  • a method for active noise reduction comprising: collecting a sound wave vibration signal inside a human ear;
  • the quiet zone is located at the mouth of the external auditory canal, and it is easy to occur that the quiet zone cannot cover the eardrum.
  • the eardrum is the organ that collects sound. Sound waves cause the eardrum to vibrate, and the information of the eardrum vibration is transmitted to the brain, and people perceive the sound. That is, the location of the eardrum is the location of auditory perception. If the quiet zone does not cover the eardrum, the collected error signal may not represent the active noise reduction effect at the eardrum, that is, it cannot represent the real noise reduction effect perceived by the human ear, which will reduce the effect of active noise reduction.
  • the error signal of active noise reduction is determined according to the sound wave vibration signal inside the human ear, so that the quiet zone is located inside the human ear.
  • the distance between the quiet zone and the eardrum is shortened, and to a certain extent The quiet zone can be made to cover the eardrum, therefore, the error signal of the active noise reduction can be made more representative of the real noise reduction effect perceived by the human ear, so that the effect of the active noise reduction can be enhanced.
  • the collecting the acoustic wave vibration signal inside the human ear includes: collecting the acoustic wave vibration signal at the eardrum.
  • Determining the error signal of active noise reduction based on the sound wave vibration signal at the eardrum is equivalent to forming a quiet zone at the eardrum, which ensures that the quiet zone covers the eardrum. Therefore, the error signal of active noise reduction can accurately represent the real perception of the human ear. Noise reduction effect, so the effect of active noise reduction can be improved.
  • the collecting the acoustic wave vibration signal at the eardrum includes: emitting light to the eardrum; receiving the light reflected back by the eardrum; according to the light reflected back by the eardrum , to obtain the acoustic vibration signal at the eardrum.
  • determining the error signal of active noise reduction based on the acoustic vibration signal at the eardrum is equivalent to forming a quiet zone at the eardrum, so that the error signal of active noise reduction can accurately represent the real noise reduction effect perceived by the human ear, Therefore, the effect of active noise reduction can be further improved.
  • the active noise reduction effect can be enhanced for both low-frequency sound signals and high-frequency sound signals.
  • the collecting the acoustic wave vibration signal inside the human ear includes: collecting the acoustic wave vibration signal in the space of the external auditory canal.
  • the error signal of active noise reduction is determined based on the acoustic vibration signal in the external auditory canal space, which is equivalent to forming a quiet zone in the external auditory canal space.
  • the distance between the quiet zone and the eardrum is shortened, so that the quiet zone can cover the eardrum to a certain extent. Therefore, the error signal of the active noise reduction can be more representative of the real noise reduction effect perceived by the human ear. Thereby, the effect of active noise cancellation can be enhanced.
  • the collecting the sound wave vibration signal inside the human ear further includes: collecting the sound wave vibration signal in the space of the external auditory canal;
  • Obtaining an error signal of active noise reduction from the signal includes: obtaining a first error signal according to the acoustic wave vibration signal at the eardrum; obtaining a second error signal according to the acoustic wave vibration signal in the external auditory canal space; and obtaining a second error signal according to the first error signal and the The second error signal is to obtain the error signal of the active noise reduction.
  • the obtaining the error signal of the active noise reduction according to the first error signal and the second error signal includes: weighting and summing the first error signal and the second error signal , to obtain the error signal of active noise reduction.
  • the obtaining the error signal of the active noise reduction according to the first error signal and the second error signal includes: averaging the first error signal and the second error signal, Obtain the error signal for Active Noise Cancellation.
  • the error signal of active noise reduction is obtained according to the acoustic wave vibration signal at the eardrum and the acoustic wave vibration signal in the external auditory canal space, which can make the acquired active error signal more comprehensive and accurate, so that the error signal can be better It represents the true noise reduction effect perceived by the human ear, so the accuracy of the error signal can be further improved, thereby better enhancing the effect of active noise reduction.
  • the collecting the acoustic wave vibration signal in the external auditory canal space includes: using a vibration sensor deployed on the earplug to collect the acoustic wave vibration signal in the external auditory canal space.
  • the vibration sensor deployed on the earplug includes acoustic vibration acquisition units deployed on multiple positions of the earplug.
  • the error signal of active noise reduction is obtained according to the acoustic vibration signals at multiple positions in the external auditory canal space, which can expand the scope of the quiet zone, and can make the error signal of active noise reduction closer to the true value perceived by the human ear.
  • Noise reduction effect which can enhance the active noise cancellation effect.
  • the vibration sensor deployed on the earplug is a film microphone that is annularly deployed on the earplug.
  • the manner of collecting the acoustic vibration signal inside the human ear can be any of the following manners:
  • the method further includes: collecting a sound wave vibration signal at the mouth of the external auditory canal; wherein, the obtaining an error signal of active noise reduction according to the sound wave vibration signal inside the human ear includes: according to the sound wave vibration signal inside the human ear.
  • the error signal of the active noise reduction is obtained from the sound wave vibration signal inside the human ear and the sound wave vibration signal of the external auditory canal opening.
  • the quiet zone can be made larger, so that the error signal of active noise reduction can be more comprehensive and accurate, and therefore, the effect of active noise reduction can be improved.
  • an active noise reduction earphone comprising: an error sensor for collecting a sound wave vibration signal inside the human ear, and obtaining an active noise reduction error signal according to the sound wave vibration signal; a controller, for determining a noise reduction signal according to the error signal of the active noise reduction obtained by the error sensor, and the noise reduction signal is used to cancel the noise signal; a speaker is used to play the noise reduction signal determined by the controller to the human ear Noise reduction signal.
  • the error sensor includes a first acoustic vibration sensor for collecting acoustic vibration signals at the eardrum.
  • the first acoustic wave vibration sensor is used to: emit light to the eardrum; receive the light reflected back by the eardrum; according to the light reflected back by the eardrum, Acoustic vibration signals at the eardrum are obtained.
  • the earphone includes an earplug
  • the error sensor includes a second acoustic vibration sensor disposed on the earplug for collecting acoustic vibration signals in the external auditory canal space.
  • the earphone includes an earplug
  • the error sensor includes a second acoustic vibration sensor disposed on the earplug, for collecting acoustic vibration signals in the external auditory canal space
  • the error sensor also includes a processing unit, configured to obtain the sound wave vibration signal in the external auditory canal space according to the sound wave vibration signal at the eardrum collected by the first sound wave vibration sensor and the sound wave vibration signal in the external auditory canal space collected by the second sound wave vibration sensor.
  • the active noise reduction error signal configured to obtain the sound wave vibration signal in the external auditory canal space according to the sound wave vibration signal at the eardrum collected by the first sound wave vibration sensor and the sound wave vibration signal in the external auditory canal space collected by the second sound wave vibration sensor.
  • the second acoustic vibration sensor includes acoustic vibration acquisition units deployed on multiple positions of the earplug.
  • the second acoustic wave vibration sensor is a thin-film microphone annularly disposed on the earplug.
  • the error sensor is also used to collect the acoustic vibration signal of the external auditory canal orifice, and used to collect the acoustic vibration signal from the human ear and the acoustic vibration of the external auditory canal orifice. signal to obtain the error signal of the active noise reduction.
  • the operation of obtaining the error signal of the active noise reduction according to the collected sound wave vibration signal inside the human ear can be performed by an error sensor or by other processing units.
  • the other processing unit may be the controller directly, or may be another processing unit inside the headset.
  • the earphone further includes an intermediate processing unit, configured to obtain an error signal of active noise reduction according to the sound wave vibration signal.
  • the operation of obtaining the error signal of active noise reduction according to the collected acoustic vibration signals inside the human ear is performed by which unit or module inside the headset may depend on the design principle of the error sensor inside the headset. .
  • the error sensor may be configured to acquire the sonic vibration signal and output the acquired signal directly without further processing the sonic vibration signal.
  • the operation of obtaining the error signal of active noise reduction according to the sound wave vibration signal may be performed by other units or modules inside the earphone.
  • the error sensor may be configured to collect the acoustic vibration signal and output a further processed signal (error signal), that is, the error sensor is further configured to obtain an error signal for active noise reduction according to the acoustic vibration signal.
  • error signal a further processed signal
  • the operation of obtaining the error signal of the active noise reduction from the acoustic vibration signal may be performed by the error sensor.
  • the controller may be a hardware circuit.
  • the controller may be an adaptive filter.
  • the error signal of active noise reduction is determined according to the sound wave vibration signal inside the human ear, so that the quiet zone is located inside the human ear.
  • the distance between the quiet zone and the eardrum is shortened, To a certain extent, the quiet zone can be made to cover the eardrum. Therefore, the error signal of the active noise reduction can be more representative of the real noise reduction effect perceived by the human ear, thereby enhancing the effect of the active noise reduction.
  • FIG. 1 is a schematic block diagram of an active noise reduction system.
  • FIG. 2 is a schematic diagram of the principle of the active noise reduction system.
  • FIG. 3 is a schematic diagram of the superposition and cancellation of the noise reduction signal and the noise signal.
  • FIG. 4 is a schematic diagram of the shape of an earphone of the active noise reduction system shown in FIG. 1 .
  • FIG. 5 is a schematic diagram illustrating the formation of a quiet zone by an existing active noise reduction system.
  • FIG. 6 is a schematic flowchart of a method for active noise reduction provided by an embodiment of the present application.
  • FIG. 7 is another schematic flowchart of the method for active noise reduction provided by an embodiment of the present application.
  • FIGS. 8 and 9 are schematic diagrams of the principle of optical detection of acoustic vibration.
  • FIG. 10 is another schematic flowchart of the method for active noise reduction provided by an embodiment of the present application.
  • FIG. 11 is still another schematic flowchart of the method for active noise reduction provided by an embodiment of the present application.
  • FIG. 12 is a schematic flowchart of an active noise reduction earphone provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a product form of an active noise reduction earphone provided by an embodiment of the present application.
  • FIG. 14 and 15 are schematic diagrams of the earphone shown in FIG. 13 in use.
  • FIG. 16 is a schematic diagram of another product form of the active noise reduction earphone provided by the embodiment of the application.
  • 17 and 16 are schematic diagrams of the earphones in use.
  • FIG. 18 is a schematic block diagram of an error sensor in an active noise reduction earphone provided by an embodiment of the present application.
  • FIG. 19 is a schematic diagram of another product form of the active noise reduction earphone provided by the embodiment of the application.
  • FIG. 20 is another schematic block diagram of an error sensor in an active noise reduction earphone provided by an embodiment of the present application.
  • FIG. 21 is still another schematic block diagram of an error sensor in an active noise reduction earphone provided by an embodiment of the present application.
  • Active noise cancellation is a technology based on the principle of superposition of sound waves to achieve noise removal by cancelling each other of sound waves.
  • Active noise reduction systems include feedforward type and feedback type, and this application only relates to feedback type active noise reduction systems. Unless otherwise specified, the active noise reduction mentioned in the embodiments of the present application refers to feedback-type active noise reduction.
  • composition and noise reduction principle of the feedback-type active noise reduction system will be described below with reference to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 .
  • the active noise reduction system generally includes a controller 110 , a speaker (speaker) 120 , an error sensor (error mic) 130 , and a reference sensor (ref mic) 140 .
  • Fig. 2 the working principle and workflow of the active noise reduction system shown in Fig. 1 are as follows.
  • Step 1 the error sensor 130 collects the error signal e(n), and transmits the error signal e(n) to the controller 110 .
  • the error signal e(n) represents the characteristics of the sound field in the quiet zone shown in FIG. 2 , for example, the characteristics of the sound field include characteristics such as sound pressure, particle velocities in different directions, and the like.
  • the concept of the quiet zone will be described below, and will not be described in detail here.
  • Error sensor 130 is typically an acoustic sensor. As shown in FIGS. 2 , 3 and 4 , the error sensor 130 is a microphone.
  • Step 2 the reference sensor 140 collects the noise signal x(n), and transmits the noise signal x(n) to the controller 110 .
  • the noise signal x(n) collected by the reference sensor 140 is an ambient noise signal. Ambient noise signals are often emitted by undesired noise sources, as shown in Figure 2.
  • Reference sensor 140 is typically an acoustic sensor. As shown in FIG. 2 , FIG. 3 and FIG. 4 , the reference sensor 140 is a microphone.
  • Step 3 the controller 110 calculates an error cost function based on the error signal e(n), and predicts the noise reduction signal y(n) output by the speaker 120 based on the noise signal x(n) based on the principle of minimizing the error cost function.
  • the noise reduction signal y(n) is used to cancel the noise signal x(n). Ideally, the noise reduction signal y(n) is the inverse of the noise signal x(n). The noise reduction signal y(n) may also be referred to as an anti-noise signal.
  • the controller 110 may be an adaptive filter.
  • Step 4 the speaker 120 sends out the noise reduction signal y(n) according to the control of the controller 110 .
  • the noise signal x(n) and the noise reduction signal y(n) reach the dead zone through the primary path and the secondary path, respectively.
  • the error sensor 130 collects is the superimposed sound signal after the noise signal x(n) and the noise reduction signal y(n) pass through the primary path and the secondary path respectively and reach the quiet zone.
  • the sound signal is called is the error signal e(n).
  • the noise signal e(n) collected by the error sensor 130 can also be described as residual noise after noise reduction processing.
  • the goal of the controller 110 predicting the noise reduction signal y(n) output by the speaker 120 is to make the noise signal x(n) and the noise reduction signal y(n) pass through the primary path and the secondary path respectively and reach the quiet zone after the superimposed signal
  • the error cost function of e(n) is the smallest.
  • the speaker 120 may be referred to as the secondary sound source, as shown in FIG. 2 .
  • the product form of the active noise reduction system is a headset, as an example, as shown in Figure 4.
  • the reference sensor 140 is arranged on the earphone cover and is used to collect ambient noise signals.
  • the error sensor 130 is arranged in the earphone cover, and is used for collecting the error signal after noise reduction processing.
  • the controller 110 is arranged in the earphone cover, and is used for predicting the noise reduction signal output by the speaker 120 according to the noise signal and the error signal.
  • the speaker 120 is arranged in the earphone cover, and plays the noise reduction signal predicted by the controller 110 .
  • the valid input sound signals shown in FIG. 4 represent the signals that the user wants to play, eg, music or call signals.
  • the sound signal reaching the human ear includes an effective sound signal, such as music or a call, in addition to the environmental noise signal and the noise reduction signal.
  • the valid sound signal will be eliminated.
  • the effective sound signal is eliminated to obtain the residual noise after active noise reduction, that is, the error signal.
  • the error signal it is the prior art to reject the effective sound signal, which will not be described in detail in this paper.
  • the primary channel and the secondary channel shown in Figure 2 are only examples and not limitation.
  • the primary channel and the secondary channel shown in Figure 2 are only to distinguish the propagation paths of the noise signal x(n) and the noise reduction signal y(n), and do not represent the physical existence of the primary channel and the noise reduction signal in the active noise reduction system. secondary channel.
  • the superposition effects of the noise signal and the noise reduction signal at different positions are not necessarily the same.
  • the error sensor collects the error signal at point A, which can represent the superposition effect of the noise signal and the noise reduction signal at point A, but not necessarily the superposition effect of the noise signal and the noise reduction signal at other positions other than point A .
  • the concept of quiet zone is proposed, which represents the area or space where the error signal collected by the error sensor is located. That is to say, where the error sensor collects the signal, there is the quiet zone.
  • the dead zone represents the region where the error signal e(n) collected by the error sensor 130 is located.
  • the error sensor is an acoustic sensor (such as a microphone). Therefore, the location where the error sensor collects the signal is the location where the error sensor is located, that is, the location where the error sensor is located is the location of the quiet zone.
  • the error sensor is located at the external auditory canal opening of the human ear, as shown in FIG. 5 . Therefore, the quiet zone is located at the external auditory canal opening.
  • the diameter of the quiet zone is about 7 centimeters (cm);
  • the diameter of the quiet zone is about 0.7cm
  • the diameter of the quiet zone is about 0.34cm.
  • the error signal of active noise reduction collected at a certain point can represent the active noise reduction effect in an area with a diameter of 7 cm where this point is located.
  • the error signal of active noise reduction collected at a certain point can represent the active noise reduction effect in an area with a diameter of 0.34 cm where this point is located.
  • the low-frequency quiet zone in FIG. 5 represents a quiet zone corresponding to a lower frequency acoustic signal, for example, a quiet zone corresponding to a 500 Hz acoustic signal (a quiet zone with a diameter of about 7 cm).
  • the high-frequency quiet zone in FIG. 5 represents a quiet zone corresponding to a higher frequency acoustic signal, for example, a quiet zone corresponding to a 10000 Hz acoustic signal (a quiet zone with a diameter of about 0.34 cm).
  • the diameter of the high-frequency quiet zone is smaller than the diameter of the low-frequency quiet zone, that is, the size of the high-frequency quiet zone is smaller than that of the low-frequency quiet zone. size.
  • the quiet zone is located at the orifice of the external auditory canal, and it is easy to occur that the quiet zone cannot cover the eardrum. As shown in Figure 5, the high-frequency quiet zone does not cover the location of the eardrum.
  • the eardrum is the organ that collects sound. Sound waves cause the eardrum to vibrate, and the information of the eardrum vibration is transmitted to the brain, and people perceive the sound. That is, the location of the eardrum is the location of auditory perception.
  • the collected error signal may not represent the active noise reduction effect at the eardrum, that is, it cannot represent the real noise reduction effect perceived by the human ear, which will reduce the effect of active noise reduction.
  • the existing active noise reduction system at least has a poor effect on the active noise reduction of high-frequency sound signals.
  • an embodiment of the present application proposes an active noise reduction solution.
  • the error signal can be more representative of the real noise reduction effect perceived by the human ear. Therefore, the active noise reduction effect can be enhanced.
  • FIG. 6 is a schematic flowchart of a method 600 for active noise reduction provided by an embodiment of the present application.
  • the execution subject of the method 600 is an earphone.
  • the method 600 includes steps S610, S620, S630 and S640.
  • the sound wave vibration signal inside the human ear represents the vibration signal caused by the sound wave inside the human ear. That is to say, the sound wave vibration signal inside the human ear represents the information of the sound wave reaching the inside of the human ear.
  • the internal structure of the human ear includes the external auditory canal and the eardrum.
  • the inside of the human ear refers to the space of the external auditory canal, not just the opening of the external auditory canal.
  • the collected acoustic vibration signals inside the human ear may include acoustic vibration signals in the external auditory canal space, and/or acoustic vibration signals at the eardrum.
  • the sound wave vibration signal in the external auditory canal space is characterized, and the sound wave reaching the inside of the human ear causes the air in the external auditory canal space to vibrate.
  • the sound wave vibration signal at the eardrum indicates that the sound wave reaching the inside of the human ear causes the eardrum to vibrate.
  • the error signal of the active noise reduction represents the sound signal after the active noise reduction processing (ie, the noise reduction signal and the ambient noise signal are superimposed).
  • the error signal of the active noise reduction can also be described as the residual signal processed by the active noise reduction.
  • the error signal represents the active noise reduction effect of the quiet zone.
  • the sound wave vibration signal inside the human ear represents the vibration signal caused by the sound wave reaching the inside of the human ear, and the vibration signal represents the information of the sound wave. That is to say, the collected sound wave vibration signal inside the human ear represents the information of the sound wave reaching the inside of the human ear.
  • the error signal of active noise reduction can be obtained according to the acoustic vibration signal inside the human ear by means of direct mapping.
  • S630 Determine the noise reduction signal according to the error signal of the active noise reduction.
  • the execution subject of the method 600 provided in this embodiment of the present application is a feedback active noise reduction headset
  • steps S610 and S620 may be performed by an error sensor in the earphone
  • step S630 may be performed by a controller in the earphone
  • step S640 may be performed by The speaker inside the headset performs.
  • the quiet zone is located at the orifice of the external auditory canal, and it is easy to occur that the quiet zone cannot cover the eardrum.
  • the error signal of active noise reduction is determined according to the sound wave vibration signal inside the human ear, so that the quiet zone is located inside the human ear.
  • the distance from the quiet zone to the eardrum is shortened.
  • the quiet zone can cover the eardrum, and therefore, the error signal of the active noise reduction can be more representative of the real noise reduction effect perceived by the human ear, thereby enhancing the effect of the active noise reduction.
  • step S610 includes: collecting an acoustic wave vibration signal at the eardrum; correspondingly, in step S620 , an error signal of active noise reduction is obtained according to the acoustic wave vibration signal at the eardrum.
  • the error signal of active noise reduction can be obtained according to the acoustic vibration signal at the eardrum by means of direct mapping.
  • Determining the error signal of active noise reduction based on the sound wave vibration signal at the eardrum is equivalent to forming a quiet zone at the eardrum, that is, it can ensure that the quiet zone covers the eardrum. Therefore, the error signal of active noise reduction can accurately represent the real perception of the human ear. Noise reduction effect, so the effect of active noise reduction can be improved.
  • the principle of light detection of sound wave vibration can be used to collect the sound wave vibration signal at the eardrum.
  • step S610 includes: emitting light to the eardrum; receiving the light reflected back by the eardrum; and obtaining a sound wave vibration signal at the eardrum according to the light reflected back by the eardrum.
  • FIG. 8 is a schematic diagram of a light detection acoustic vibration system.
  • the light detection acoustic wave vibration system includes a light transmitter, a light reflector, a light receiver and a photoelectric converter.
  • Light reflectors are objects that are easily vibrated by sound pressure around the detection target.
  • the light emitter emits light onto the light reflector.
  • the light receiver detects the light reflected back by the light reflector. Because the light reflector is modulated by the vibration generated by the sound pressure, the light reflected back by the light reflector carries the acoustic wave information.
  • the photoelectric converter can obtain acoustic wave information by demodulating the light reflected back by the light reflector.
  • the principle of vibration pickup is the same.
  • the light transmitter emits light onto the eardrum.
  • the light receiver detects the light reflected back by the eardrum.
  • the eardrum modulates the light by the vibrations produced by the sound pressure, so the light reflected back by the light reflector carries the sound wave information.
  • the photoelectric converter can obtain the acoustic vibration signal of the eardrum by demodulating the light reflected back by the light reflector. Specifically, the vibration of the eardrum will cause different degrees of light deflection, and the size of the light spot formed on the photoelectric converter will be different. The size of the light spot will form a current, and the magnitude of the current has a linear relationship with the vibration of the sound wave. Therefore, the current information obtained on the photoelectric converter is the acoustic vibration signal at the eardrum.
  • FIG. 9 is a schematic diagram of a laser detection sound system in the prior art.
  • the vibrator is glass.
  • the sound wave vibration is L(t)
  • the sound pressure at a particle of the thin film medium is P(x, y)
  • the glass is translated by the sound pressure as X(t)
  • the translation of the reflected light is Y(t)
  • the spot area on the photosensitive surface of the detector is S(t)
  • the output current of the detector is I(t).
  • the sound pressure of the sound wave at the point of incidence is:
  • k 1 is a constant coefficient about the acoustic wave transmission distance and the air environment.
  • the motion of the surface of the medium is proportional to the sound pressure acting on this particle, and the medium is translated. And if the frequency of the sound is different and the intensity is different, the degree of vibration caused is also different.
  • the translation of the glass by the sound pressure is:
  • k 2 is a constant coefficient related to the medium.
  • the translation of the reflected light is:
  • the detector output current is:
  • k 1 , k 2 , k 3 , k 4 and sin ⁇ are all constants, and the output current of the detector has a linear relationship with the acoustic vibration, that is, the acoustic signal is collected by recording the electrical signal.
  • the principle of vibration pickup is the same.
  • the light emitted to the eardrum may be infrared light (wavelength is 800 nanometers (nm)) or other low-wavelength light.
  • infrared rays are sent to the eardrum with an emission intensity no higher than 0.01 milliwatts (mw).
  • the error signal of active noise reduction is determined based on the sound wave vibration signal at the eardrum, which is equivalent to forming a quiet zone at the eardrum, so that the error signal of active noise reduction can accurately represent the real noise reduction effect perceived by the human ear , so the effect of active noise reduction can be further improved.
  • step S610 includes: collecting the acoustic wave vibration signal in the external auditory canal space; correspondingly, in step S620 , obtaining an error signal of active noise reduction according to the acoustic wave vibration signal in the external auditory canal space.
  • the error signal of active noise reduction can be obtained according to the acoustic vibration signal in the external auditory canal space by means of direct mapping.
  • the error signal of active noise reduction is determined based on the acoustic vibration signal in the external auditory canal space, which is equivalent to forming a quiet zone in the external auditory canal space.
  • the distance between the quiet zone and the eardrum is shortened, so that the quiet zone can cover the eardrum to a certain extent. Therefore, the error signal of the active noise reduction can be more representative of the real noise reduction effect perceived by the human ear. Thereby, the effect of active noise cancellation can be enhanced.
  • acoustic vibration signals in the external auditory canal space can be collected using vibration sensors deployed on the earbuds.
  • the vibration sensor deployed on the earplug can collect sound vibration signals in the external auditory canal space.
  • the vibration sensor deployed on the earbud can be a membrane microphone.
  • the principle of the film microphone is the piezoelectric principle.
  • the principle that the film microphone collects the sound wave vibration signal is the prior art, which will not be described in detail in this article.
  • step S610 the acoustic vibration signals at multiple points in the external auditory canal space are collected.
  • the acoustic wave vibration signals at multiple locations in the external auditory canal space may represent information of the acoustic waves arriving at multiple locations in the external auditory canal space.
  • the error signal of active noise reduction obtained according to the acoustic vibration signals at multiple positions in the external auditory canal space represents the acoustic signal energy in a larger space in the external auditory canal space.
  • the error signal collected by the error sensor is single-point collection, as shown in FIG. 5 .
  • this embodiment can be regarded as extending the error signal collection of a single point to the error signal collection of more spatial positions, that is, a larger-range quiet zone can be formed. Because the range of the quiet zone is increased, the quiet zone can be guaranteed to cover the eardrum to a greater extent, so that the error signal of the active noise reduction can better represent the real noise reduction effect perceived by the human ear, thereby enhancing the effect of active noise reduction. Effect.
  • the error signal of the active noise reduction is obtained according to the acoustic vibration signals at multiple positions in the external auditory canal space, which can expand the range of the quiet zone and make the error signal of the active noise reduction closer to that perceived by the human ear.
  • True noise-cancellation which enhances active noise-cancellation.
  • step S610 includes: collecting acoustic wave vibration signals at the eardrum, and collecting acoustic wave vibration signals in the external auditory canal space; wherein step S620 includes steps S621 , S622 and S623 .
  • an error signal can be obtained as the first error signal according to the acoustic vibration signal at the eardrum by means of direct mapping.
  • S622 Obtain a second error signal according to the acoustic vibration signal in the external auditory canal space.
  • an error signal can be obtained as the second error signal according to the acoustic vibration signal at the eardrum by means of direct mapping.
  • the first error signal and the second error signal may be weighted and added to obtain an error signal of active noise reduction.
  • first error signal and the second error signal may be comprehensively processed in other manners according to application requirements, so as to obtain an error signal with active noise reduction.
  • the error signal of active noise reduction is determined based on the sound wave vibration signal at the eardrum and the sound wave vibration signal in the external auditory canal space, which is equivalent to forming a quiet zone at the eardrum and the external auditory canal space.
  • the error signal of active noise reduction is obtained according to the acoustic wave vibration signal at the eardrum and the acoustic wave vibration signal in the external auditory canal space, which can make the acquired active error signal more comprehensive and accurate, so that the error signal can be better It represents the true noise reduction effect perceived by the human ear, so the accuracy of the error signal can be further improved, thereby better enhancing the effect of active noise reduction.
  • this embodiment can achieve higher frequency active noise reduction, and can also achieve a more stable active noise reduction effect.
  • the mode of collecting the acoustic wave vibration signal inside the human ear can be any one of the following modes 1), 2) and 3).
  • the method 600 may further include: collecting the acoustic wave vibration signal of the external auditory canal opening; wherein, step S620 includes: according to the acoustic wave vibration signal inside the human ear and the acoustic wave vibration signal of the external auditory canal opening, obtaining Error signal for active noise reduction.
  • the method shown in FIG. 5 can be used to collect the acoustic vibration signal of the external auditory canal opening.
  • the quiet zone can be made larger, so that the error signal of active noise reduction can be more comprehensive and accurate, and therefore, the effect of active noise reduction can be improved.
  • the method 600 further includes collecting a noise signal, wherein step S630 includes: determining a noise reduction signal according to the collected noise signal and the error signal obtained in step S620 .
  • the minimum mean square error algorithm can be used to calculate the noise reduction signal based on x(n) and e(n).
  • the error signal of active noise reduction is determined according to the sound wave vibration signal inside the human ear, so that the quiet zone is located inside the human ear.
  • the distance between the quiet zone and the eardrum is narrowed. The distance can make the quiet zone cover the eardrum to a certain extent. Therefore, the error signal of active noise reduction can be more representative of the real noise reduction effect perceived by the human ear, thereby enhancing the effect of active noise reduction.
  • the active noise reduction method provided by the embodiments of the present application can be applied to earphones.
  • the earphones to which the embodiments of the present application can be applied may have various forms, such as open type, closed type, earmuff type, earhook type, earplug type, and earplug type.
  • FIG. 12 is a schematic block diagram of an active noise reduction earphone 1200 provided by an embodiment of the present application.
  • the earphone 1200 includes a controller 1210 , an error sensor 1220 and a speaker 1230 .
  • the error sensor 1220 is used to collect the sound wave vibration signal inside the human ear, and obtain the error signal of active noise reduction according to the sound wave vibration signal.
  • the controller 1210 is configured to determine the noise reduction signal according to the error signal of the active noise reduction obtained by the error sensor 1220, and the noise reduction signal is used to cancel the noise signal.
  • the speaker 1230 is used to play the noise reduction signal determined by the controller 1210 to the human ear.
  • the controller 1210 is configured to control the speaker 1230 to play the noise reduction signal when the noise signal reaches the earphone 1200 .
  • the active noise reduction earphone 1200 determines the error signal of the active noise reduction according to the sound wave vibration signal inside the human ear, so that the quiet zone is located inside the human ear. Compared with the prior art, the quiet zone is narrowed to The distance of the eardrum can make the quiet zone cover the eardrum to a certain extent. Therefore, the error signal of the active noise reduction can be more representative of the real noise reduction effect perceived by the human ear, thereby enhancing the effect of active noise reduction.
  • the operation of obtaining the error signal of active noise reduction according to the collected acoustic vibration signals inside the human ear can be performed by the error sensor 1220 or by other processing units, and the other processing units can be directly the controller 1210, or It could be another processing unit inside the headset 1200 .
  • the earphone 1200 further includes an intermediate processing unit for obtaining an error signal of active noise reduction according to the acoustic vibration signal.
  • the operation of obtaining the error signal of active noise reduction according to the collected acoustic vibration signals inside the human ear is performed by which unit or module inside the headset may depend on the design principle of the error sensor inside the headset. .
  • the error sensor may be configured to acquire the sonic vibration signal and output the acquired signal directly without further processing the sonic vibration signal.
  • the operation of obtaining the error signal of active noise reduction according to the sound wave vibration signal may be performed by other units or modules inside the earphone.
  • the error sensor may be configured to collect the acoustic vibration signal and output a further processed signal (error signal), that is, the error sensor is further configured to obtain an error signal for active noise reduction according to the acoustic vibration signal.
  • error signal a further processed signal
  • the operation of obtaining the error signal of the active noise reduction from the acoustic vibration signal may be performed by the error sensor.
  • the error sensor is configured to collect the acoustic wave vibration signal, and further process the acoustic wave vibration signal to obtain the error signal of active noise reduction as an example for description.
  • the error sensor 1220 includes a first acoustic vibration sensor 1221 for collecting acoustic vibration signals at the eardrum.
  • the first acoustic wave vibration sensor 1221 is located on the earphone casing. Controller 1210 is not shown in FIG. 13 .
  • the first acoustic wave vibration sensor 1221 may use the principle shown in FIG. 8 and FIG. 9 to collect the acoustic wave vibration signal at the eardrum.
  • the first acoustic wave vibration sensor 1221 is used to: emit light to the eardrum; receive the light reflected back by the eardrum; and obtain the acoustic vibration signal at the eardrum according to the light reflected back by the eardrum.
  • the first acoustic wave vibration sensor 1221 includes a light transmitter, a light receiver, and a photoelectric converter.
  • Light emitters are used to emit light towards the eardrum.
  • the light receiver is used to receive the light reflected back from the eardrum.
  • the photoelectric converter is used to obtain the acoustic vibration signal at the eardrum according to the light received by the light receiver.
  • the error signal of active noise reduction is determined based on the acoustic vibration signal at the eardrum, which is equivalent to forming a quiet zone at the eardrum, as shown in Figure 14.
  • the error signal of active noise reduction can be determined according to the sound wave vibration signal at the eardrum, which is equivalent to forming a quiet zone at the eardrum, so that the error signal of active noise reduction can accurately represent the real perception of the human ear. Noise reduction effect, so the effect of active noise reduction can be further improved.
  • the earphone 1200 provided in this embodiment can form a quiet zone at the eardrum, the active noise reduction effect can be enhanced for both low-frequency sound signals and high-frequency sound signals.
  • the earphone 1200 includes an earplug, and the error sensor 1220 includes a second acoustic vibration sensor 1222 disposed on the earplug for collecting acoustic vibration signals in the external auditory canal space.
  • Controller 1210 is not shown in FIG. 16 .
  • the second acoustic vibration sensor 1222 is a film microphone.
  • the error signal of active noise reduction is determined based on the acoustic vibration signal in the external auditory canal space, which is equivalent to forming a quiet zone in the external auditory canal space.
  • the distance between the quiet zone and the eardrum is shortened, so that the quiet zone can cover the eardrum to a certain extent. Therefore, the error signal of the active noise reduction can be more representative of the real noise reduction effect perceived by the human ear. Thereby, the effect of active noise cancellation can be enhanced.
  • the second acoustic vibration sensor 1222 includes acoustic vibration acquisition units deployed at multiple locations of the earplug.
  • the second acoustic vibration sensor 1222 is a thin-film microphone annularly deployed on the earplug, as shown in FIG. 16 .
  • a top view of the earplug is also given in FIG. 16 .
  • the top view of the earplug referred to here represents a view of the side of the earplug facing the human ear.
  • the second acoustic wave vibration sensor 1222 may be a thin-film microphone annularly disposed on the inner wall of the earplug.
  • FIG. 17 is a schematic diagram of the earphone 1200 shown in FIG. 16 in a use state. It should be understood that when the earphone 1200 is in use, the earplug is located in the external auditory canal, that is, the second acoustic wave vibration sensor 1222 is located in the external auditory canal space. Because the second acoustic vibration sensor 1222 is a thin-film microphone annularly disposed on the earplug, the second acoustic vibration sensor 1222 can collect acoustic vibration signals at multiple positions in the external auditory canal space.
  • the error signal collected by the error sensor is single-point collection, as shown in FIG. 5 .
  • the error sensor 1220 includes a first acoustic wave vibration sensor 1221 , a second acoustic wave vibration sensor 1222 and a processing unit 1223 .
  • the first acoustic vibration sensor 1221 is used to collect acoustic vibration signals at the eardrum.
  • the second acoustic vibration sensor 1222 is deployed on the earbud of the earphone.
  • the second acoustic vibration sensor 1222 is used to collect acoustic vibration signals in the external auditory canal space.
  • the processing unit 1223 is configured to obtain an error signal of active noise reduction according to the acoustic vibration signal at the eardrum collected by the first acoustic vibration sensor 1221 and the acoustic vibration signal in the external auditory canal space collected by the second acoustic vibration sensor 1222 .
  • the processing unit 1223 is configured to obtain the first error signal according to the sound wave vibration signal at the eardrum collected by the first sound wave vibration sensor 1221; and obtain the second error signal according to the sound wave vibration signal in the external auditory canal space collected by the second sound wave vibration sensor 1222 signal; according to the first error signal and the second error signal, the error signal of active noise reduction is obtained.
  • the processing unit 1223 can obtain the error signal e(n) of active noise reduction according to the following formula:
  • a1 and a2 are weights.
  • a1 is 0.8 and a2 is 0.2.
  • both a1 and a2 are 1.
  • the values of a1 and a2 can be flexibly adjusted based on the actual effect.
  • the earphone 1200 includes an earplug, the first acoustic wave vibration sensor 1221 is located on the earphone shell, and the second acoustic wave vibration sensor 1222 is a film microphone annularly disposed on the earplug.
  • the controller 1210 and the processing unit 1223 are not shown in FIG. 19 .
  • the first acoustic wave vibration sensor 1221 to collect the acoustic wave vibration signal at the cover film, please refer to the description above in conjunction with FIG. 14 and FIG. 15 . See the above description in conjunction with FIG. 17 , which will not be repeated here.
  • the error signal of active noise reduction is determined based on the sound wave vibration signal at the eardrum and the sound wave vibration signal in the external auditory canal space, which is equivalent to forming a quiet zone at the eardrum and the external auditory canal space. As shown in FIG. 19, a quiet zone 1 is formed at the eardrum, and a quiet zone 2 is formed in the external auditory canal space.
  • the obtained active error signal can be made more comprehensive and accurate, so that the error signal can be made more comprehensive and accurate. It better represents the true noise reduction effect perceived by the human ear, so the accuracy of the error signal can be further improved, thereby better enhancing the effect of active noise reduction.
  • this embodiment can achieve higher frequency active noise reduction, and can also achieve a more stable active noise reduction effect.
  • the error sensor 1220 is also used to collect the acoustic vibration signal of the external auditory canal orifice, and to obtain the error signal of active noise reduction according to the acoustic vibration signal inside the human ear and the acoustic vibration signal of the external auditory canal opening. .
  • the error sensor 1220 includes a first acoustic vibration sensor 1221 , a second acoustic vibration sensor 1222 , an acoustic sensor 1224 and a processing unit 1223 .
  • the first acoustic vibration sensor 1221 is used to collect acoustic vibration signals at the eardrum.
  • the second acoustic vibration sensor 1222 is deployed on the earbud of the earphone.
  • the second acoustic vibration sensor 1222 is used to collect acoustic vibration signals in the external auditory canal space.
  • the acoustic sensor 1224 is used to collect the acoustic vibration signal of the external auditory canal opening.
  • the processing unit 1223 is used for the acoustic vibration signal at the eardrum collected by the first acoustic vibration sensor 1221, the acoustic vibration signal in the external auditory canal space collected by the second acoustic vibration sensor 1222, and the acoustic vibration signal of the external auditory canal orifice collected by the acoustic sensor 1224. , to obtain the error signal of active noise reduction.
  • the processing unit 1223 is configured to obtain the first error signal according to the sound wave vibration signal at the eardrum collected by the first sound wave vibration sensor 1221; and obtain the second error signal according to the sound wave vibration signal in the external auditory canal space collected by the second sound wave vibration sensor 1222
  • the third error signal is obtained according to the acoustic vibration signal of the external auditory canal orifice collected by the acoustic sensor 1224 ; the error signal of active noise reduction is obtained according to the first error signal, the second error signal and the third error signal.
  • the processing unit 1223 can obtain the error signal e(n) of active noise reduction according to the following formula:
  • a1, a2 and a3 are weights.
  • a1 is 0.8
  • a2 is 0.15
  • a3 is 0.05
  • a1 and a2 are both 1 and a3 is 0.5.
  • the values of a1, a2 and a3 can be flexibly adjusted based on the actual effect.
  • the acoustic sensor 1224 may be an error sensor in an existing active noise reduction system, such as the error sensor 130 shown in FIGS. 1 to 4 .
  • the earphone 1200 provided in this embodiment collects sound wave vibration signals from multiple parts of the ear through a plurality of sensors, and then obtains an error signal for active noise reduction according to the sound wave vibration signals collected from multiple places on the ear, which can make the quiet zone larger, so that the active noise reduction can be made larger.
  • the error signal of noise is more comprehensive and accurate, therefore, the effect of active noise reduction can be improved.
  • the error sensor 1220 includes a variety of sensors (eg, any two or all of the first sonic vibration sensor 1221, the second sonic vibration sensor 1222, and the acoustic sensor 1224) and the processing unit 1223
  • the processing unit 1222 may be divided into multiple sub-processing units.
  • the error sensor 1220 includes a first acoustic wave vibration sensor 1221, a second acoustic wave vibration sensor 1222, a first sub-processing unit 1222a, a second sub-processing unit 1222b, and a third sub-processing unit 1222c.
  • the first acoustic wave vibration sensor 1221 is used for collecting the acoustic wave vibration signal at the eardrum; the first sub-processing unit 1222a is used for acquiring the first error signal according to the acoustic wave vibration signal at the eardrum.
  • the second acoustic wave vibration sensor 1222 is used for collecting the acoustic wave vibration signal in the external auditory canal space; the second sub-processing unit 1222b is used for acquiring the second error signal according to the acoustic wave vibration signal in the external auditory canal space.
  • the third sub-processing unit 1222c is configured to obtain an error signal of active noise reduction according to the first error signal and the second error signal.
  • the first acoustic wave vibration sensor 1221 and the first sub-processing unit 1222a as a whole can be regarded as a sub-structure of the error sensor 1220 (sub-structure 1 shown in FIG. 21 )
  • the second acoustic wave vibration sensor 1222 and the second sub-processing unit 1222b as a whole can be regarded as another sub-structure in the error sensor 1220 (sub-structure 2 shown in FIG. 21 )
  • the third sub-processing unit 1222c can be regarded as an error Integrated processing module in sensor 1220.
  • the error sensor 1220 may include one or more substructures as shown in FIG. 21 , wherein each substructure may acquire a defined error signal.
  • the error sensor 1220 only includes one substructure, which is the first substructure or the second substructure shown in FIG. 21 .
  • the error sensor 1220 may not include the third sub-processing unit 1222c.
  • the error sensor 1220 includes two or more sub-structures, and each sub-structure can collect a defined error signal.
  • the error sensor 1220 further includes a third sub-processing unit 1222c for processing two Or the error signals obtained by two or more sub-structures are comprehensively processed, and finally the error signal of active noise reduction is obtained.
  • the error sensor 1220 is shown in FIG. 21 , or the error sensor 1220 includes sub-structure 3 in addition to sub-structure 1 and sub-structure shown in FIG. 21 , and sub-structure 3 includes an acoustic sensor with the corresponding sub-processing unit.
  • FIG. 18 , FIG. 20 and FIG. 21 are only examples and not limitations. According to the functions that the error sensor 1220 can implement, the internal modules of the error sensor 1220 can be divided in various ways.
  • FIG. 18 , FIG. 20 and FIG. 21 are logical structural diagrams of the error sensor 1220 , and the error sensor 1220 may physically be composed of a plurality of physical entities of different shapes.
  • the earphone 1200 may further include a reference sensor 1240 for collecting noise signals.
  • the reference sensor 1240 may be similar to the reference sensor 140 in FIG. 4 and disposed outside the ear cup for collecting ambient noise signals.
  • the controller 1210 is configured to determine the noise reduction signal according to the error signal obtained by the error sensor 1220 and the noise signal collected by the reference sensor 1240 .
  • the controller 1210 can use the following formula , get the noise reduction signal y(n):
  • w(n) represents the weight coefficient or filter coefficient
  • the second formula is the update formula of w(n).
  • u represents the convergence factor, and the value of u can be random.
  • the weight coefficient w(n+1) at the next moment can be obtained by adding the weight coefficient w(n) at the current moment and an input proportional to the error function (e(n)x(n)).
  • the controller 1210 may be a hardware circuit.
  • the controller 1210 may be an adaptive filter.
  • the controller 1210 may be referred to as an ANC chip.
  • FIG. 13 , FIG. 14 , FIG. 15 , FIG. 16 , FIG. 17 and FIG. 19 are only examples and not limitations. As long as the error signal of active noise reduction can be determined according to the acoustic vibration signal inside the human ear, the error sensor 1220 can be flexibly set according to application requirements.
  • the solutions provided by the embodiments of the present application may not only be limited to active noise reduction headphones, but may also be applied to other active noise reduction fields.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, removable hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)

Abstract

L'invention concerne un procédé d'annulation active du bruit, ainsi qu'un écouteur. Le procédé consiste à : acquérir un signal de vibration d'onde sonore à l'intérieur d'une oreille humaine (S610) ; en fonction du signal de vibration d'onde sonore à l'intérieur de l'oreille humaine, obtenir un signal d'erreur d'annulation active du bruit (S620) ; en fonction du signal d'erreur de l'annulation active du bruit, déterminer un signal d'annulation de bruit, le signal d'annulation de bruit étant utilisé pour annuler un signal de bruit (S630) ; et émettre le signal d'annulation de bruit à l'oreille humaine (S640). Un signal d'erreur d'annulation active de bruit est déterminé en fonction d'un signal de vibration d'onde sonore à l'intérieur d'une oreille humaine de façon à ce qu'une zone silencieuse soit située à l'intérieur de l'oreille humaine et que la zone silencieuse puisse recouvrir le tympan dans une certaine mesure. Par conséquent, le signal d'erreur de l'annulation active du bruit peut mieux représenter l'effet d'annulation de bruit véritable perçu par une oreille humaine, ce qui permet d'améliorer l'effet d'annulation active du bruit.
PCT/CN2020/104467 2020-07-24 2020-07-24 Procédé et appareil d'annulation active du bruit Ceased WO2022016511A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114827813A (zh) * 2022-04-26 2022-07-29 歌尔股份有限公司 一种降噪方法、耳机设备及存储介质

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1032243A2 (fr) * 1999-02-25 2000-08-30 Koss Corporation Dispositif d'écouteur stéréophonique
US20090097681A1 (en) * 2007-10-12 2009-04-16 Earlens Corporation Multifunction System and Method for Integrated Hearing and Communication with Noise Cancellation and Feedback Management
US20110098551A1 (en) * 2008-05-30 2011-04-28 Starkey Laboratories, Inc. Measurement of sound pressure level and phase at eardrum by sensing eardrum vibration
CN203482364U (zh) * 2012-02-21 2014-03-12 沃福森微电子股份有限公司 耳机、噪声消除系统、耳机系统及放声系统
CN108924681A (zh) * 2018-06-05 2018-11-30 四川斐讯信息技术有限公司 一种自动调节音量的耳机以及方法
CN110012378A (zh) * 2019-04-08 2019-07-12 深圳市九音科技有限公司 一种语音降噪的方法、耳塞和计算机存储介质

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9706288B2 (en) * 2015-03-12 2017-07-11 Apple Inc. Apparatus and method of active noise cancellation in a personal listening device
US9613615B2 (en) * 2015-06-22 2017-04-04 Sony Corporation Noise cancellation system, headset and electronic device
EP3182721A1 (fr) * 2015-12-15 2017-06-21 Sony Mobile Communications, Inc. Contrôle d'expérience own-voice de locuteur avec oreille occultée
CN111034217A (zh) * 2017-09-13 2020-04-17 索尼公司 音频处理装置和音频处理方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1032243A2 (fr) * 1999-02-25 2000-08-30 Koss Corporation Dispositif d'écouteur stéréophonique
US20090097681A1 (en) * 2007-10-12 2009-04-16 Earlens Corporation Multifunction System and Method for Integrated Hearing and Communication with Noise Cancellation and Feedback Management
US20110098551A1 (en) * 2008-05-30 2011-04-28 Starkey Laboratories, Inc. Measurement of sound pressure level and phase at eardrum by sensing eardrum vibration
CN203482364U (zh) * 2012-02-21 2014-03-12 沃福森微电子股份有限公司 耳机、噪声消除系统、耳机系统及放声系统
CN108924681A (zh) * 2018-06-05 2018-11-30 四川斐讯信息技术有限公司 一种自动调节音量的耳机以及方法
CN110012378A (zh) * 2019-04-08 2019-07-12 深圳市九音科技有限公司 一种语音降噪的方法、耳塞和计算机存储介质

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114827813A (zh) * 2022-04-26 2022-07-29 歌尔股份有限公司 一种降噪方法、耳机设备及存储介质
CN114827813B (zh) * 2022-04-26 2025-07-11 歌尔股份有限公司 一种降噪方法、耳机设备及存储介质

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