EP3979663B1 - Kopfhörer mit geräuschreduzierung - Google Patents

Kopfhörer mit geräuschreduzierung Download PDF

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Publication number
EP3979663B1
EP3979663B1 EP21200269.5A EP21200269A EP3979663B1 EP 3979663 B1 EP3979663 B1 EP 3979663B1 EP 21200269 A EP21200269 A EP 21200269A EP 3979663 B1 EP3979663 B1 EP 3979663B1
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EP
European Patent Office
Prior art keywords
noise
transfer function
filter
microphone
canceling
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Active
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EP21200269.5A
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English (en)
French (fr)
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EP3979663A1 (de
Inventor
Vu Hoang Co Thuy
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Devialet SA
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Devialet SA
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Publication of EP3979663A1 publication Critical patent/EP3979663A1/de
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Classifications

    • 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
    • H04R1/1083—Reduction of ambient noise
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • G10K11/17827—Desired external signals, e.g. pass-through audio such as music or speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17853—Methods, e.g. algorithms; Devices of the filter
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
    • 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
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • 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
    • H04R3/04—Circuits for transducers for correcting frequency response
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • 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
    • H04R2460/01—Hearing devices using active noise cancellation
    • 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
    • H04R25/453—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically

Definitions

  • the noise reduction audio headset comprises at least one microphone placed either inside the cavity between the electro-acoustic transducer and the ear canal, or outside this cavity. Ideally, such a headset has microphones placed in both positions.
  • the signals from the two microphones are processed by digital filters which can be the combination of one or more filters.
  • Headsets with an internal microphone generally have good performance in terms of noise reduction level, commonly of the order of 20 to 30 dB, but in a limited frequency range, typically 50 to 1000 Hz, due to the instability of the feedback loop formed by the internal microphone and its filter directly receiving the signals emitted by the electro-acoustic transducer. This instability can cause feedback and the filters therefore have a deduced action range to avoid this phenomenon.
  • Headsets with an external microphone do not have this restriction in terms of instability in the sense that there is only a very attenuated signal of around 50 dB coming from the electro-acoustic transducer picked up by the external microphone , which does not create feedback. They generally provide attenuations of only 10 dB, since the microphone favors one direction of pickup of external noise coming towards the ear.
  • Noise-canceling headphones with an external microphone can theoretically attenuate noise above 1 kHz, but performance is very dependent on the direction of the noise source, particularly at higher frequencies.
  • the filters used at the output of external or internal microphones are designed to seek to overcome the problems previously mentioned, namely feedback for internal microphones and reduced performance due to the high directivity of the measurements in the case of the external microphone.
  • the aim of the invention is to propose a solution to this problem of feedback for internal microphones, and the difficulty of constructing a high-performance filter taking into account the directivity for external microphones while making it possible to broaden the satisfactory frequency ranges of the reducer. noise.
  • the subject of the invention is a noise reduction audio headset as defined in the independent claim.
  • Optional aspects are defined in the dependent claims.
  • FIG. 1 is schematically illustrated a noise reduction audio headset 10.
  • It includes a sound reproduction cavity 12 inside which is schematized an ear 14 of the wearer of the headset.
  • this cavity comprises an electro-acoustic transducer 16 placed opposite the ear canal of the ear.
  • This cavity 12 is formed for example by a shell covering most of the ear in the case of external audio headphones or takes the form of an anatomical housing which can be introduced into the entrance to the ear canal in the case of 'an in-ear earphone.
  • the transducer 16 is connected, for its excitation, to an amplifier 18, assumed to have unity gain, receiving a digital signal to be reproduced through a digital/analog converter 20.
  • the headphones include an input 22 for a musical signal to be reproduced connected to the input of the digital/analog converter 20 through an equalization filter 24.
  • the headset 10 comprises an internal anti-noise processing chain 30 comprising an internal microphone 31 disposed inside the cavity 12 facing the electro-acoustic transducer 16.
  • the external microphone 31 is capable of capturing the sound produced by the transducer 16 and the external noise at the level of the outer envelope of the cavity 12, denoted bext, filtered by the cavity 12 whose transfer function is denoted HPA.
  • the path formed between the transducer 16 and the user's eardrum is called "secondary path" and its transfer function is denoted Ha.
  • the transfer function between the measurement point of the internal microphone 31 and the eardrum is denoted Hmici-t.
  • Hmici-t The transfer function between the transducer 16 and the measuring point of the microphone 31 is equal to Ha/Hmici-t.
  • Hmici-t the distance between the internal microphone 31 and the eardrum being very small, Hmici-t is substantially equal to 1. Consequently, it is considered in practice and in the rest of the document that the transfer function of the secondary path and the transfer function between the transducer 16 and the measurement point of the internal microphone 31 are both equal to Ha.
  • the microphone 31 is connected, in the chain 30, to an internal signal processing filter 34 capable of providing an anti-noise signal, with the interposition of an analog/digital converter 32.
  • the output of the internal processing filter 34 is connected to the amplifier 18 through an adder 38 arranged upstream of the digital/analog converter 20. This adder ensures the addition of the equalized signals coming from the input 22 and the signals anti-noise from the internal processing chain 30.
  • the headset 10 includes an external anti-noise processing chain 40 comprising an external microphone 41 installed outside the cavity 12.
  • the external microphone 41 is capable of capturing the external noise bext assigned to a transfer function Hbext.
  • Hbext is the transfer function between the external surface of the cavity 12 where the external noise bext applies and the external microphone 41, as illustrated in the figure 1 .
  • the external microphone 41 is connected via an analog/digital converter 42 to an external processing filter 44 whose output is connected to the adder 38.
  • the adder 38 thus ensures routing to the amplifier 18, through the analog/digital converter 20, of the anti-noise signals produced at the output of the filters 34 and 44 and of the equalized musical signal to be reproduced coming from the input 22.
  • the filters and equalizers described here are digital filters implemented in a digital signal processor (DSP in English).
  • the headset 10 comprises the two internal anti-noise processing chains 30 and external 40 or either the internal anti-noise processing chain 30 or the external anti-noise processing chain 40 is removed and only one of the two associated microphones and filters is retained.
  • the transfer function of the secondary path processed is the transfer function of the secondary path affected by the transfer functions of the different components ensuring the processing up to the transducer 16, with the exception of the internal processing filter 34 or external 44 depending on the case.
  • this concerns in particular the transfer functions of the microphone 31 or 41 depending on the case, of the analog/digital converter 32 or 42 depending on the case and of the digital/analog converter 20.
  • the amplifier 18 is assumed to be unitary and if such n This is not the case, its transfer function is also integrated into the transfer function of the secondary path processed.
  • the inverse of the transfer function of the processed secondary path is applied by a stabilization filter denoted 34A and 44A respectively for filters 34 and 44.
  • These filters 34A, 34B have a stabilization transfer function denoted HFBcorr and HFFcorr respectively.
  • Each stabilization filter 34A, 44A is followed, at output, respectively in the processing filter 34, 44, by a noise cancellation filter 34B, 44B whose transfer function is denoted respectively HFB2, HFF2.
  • the digital filters 34A, 44A and 34B, 44B used are for example infinite impulse response (IIR) filters or finite impulse response (FIR) filters.
  • HPA the transfer function s/bext in the absence of an active noise reduction device, in other words, it is the passive attenuation of the cavity, bext being the ambient noise on the external envelope of this cavity.
  • Ha depends on the characteristics of the transducer, as well as the acoustic architecture around it, and in particular the chambers in front and behind the transducer when it is a loudspeaker.
  • HFB HFBcorr * HFB2
  • the filter 34A we first proceed, on a complete headset but without programming the internal processing filter 34 in the digital signal processor (DSP in English), to the measurement of the transfer function PlantFB of the secondary path processed by implementing an excitation of the transducer 16 by a sine function of variable frequency over the entire audio range and measuring the signal obtained by an artificial ear 14, which makes it possible to determine the value of Ha.
  • DSP digital signal processor
  • the PlantFB transfer function does not integrate the delays exp(-pT FB ) and exp(-pD FB ), it is invertible and its inverse being causal can be produced by a filter in a real-time system. This is why delays are not taken into account in the transfer function of the processed secondary path. Without this, the terms constituting delays would be invertible but would not allow the construction of a filter implementing its inverse in a real-time system, this filter then having to be anti-causal.
  • the stabilization filter 34A is constructed so that its transfer function is substantially equal to the inverse of the transfer function of the secondary path, over the entire audio range, and in particular from 5 Hz to 50 Hz and from 1 kHz to 10 kHz, with an error on the gain of 5 dB, advantageously 1 dB, and with a phase shift of +45 to -45° on the phase corrected for the linear phase due to the pure delay resulting from propagation in air and processor delay.
  • the filter is programmed and implemented in the digital signal processor (DSP). It is advantageously produced by a combination of several cascaded filters.
  • DSP digital signal processor
  • the second part of the filter 34 consisting of the noise cancellation filter 34B with transfer function HFB2, is designed so that stability is ensured for all frequencies, while applying the highest possible gain in the audio band and in particular greater than 20 dB to provide maximum noise cancellation performance.
  • Filter 34B is advantageously formed of a proportional integral (PI) filter or a stepped filter known as a shelving filter in English.
  • phase of the denominator is only dependent on a pure delay, which is the sum of the time T FB of physical propagation of the acoustic wave and the time D FB of processing of the digital signal processor (DSP in English), and the phase of the HFB2 noise cancellation filter pushing back into the frequency band, a cancellation of the denominator, which is the origin of the feedback. This is thus avoided, even if the anti-noise has a high gain over a wide frequency range.
  • HFF HFFcorr * HFF2
  • PlantFF Gadce * Gdac * Hmice * Ha
  • the stabilization filter 44A is constructed so that, as in the previous embodiment, its transfer function is substantially equal to the inverse of the transfer function of the secondary path, from 5 Hz to 50 Hz and from 1 kHz to 10 kHz, and advantageously over the entire audio range, with an error on the gain of 5 dB, advantageously 1 dB, and with a phase shift of +45 to -45° on the phase without taking the phase into account linear due to the pure delay resulting from propagation in the air and the delay due to the processor.
  • HFFopt ⁇ HPA / Hbext / PlantFF * exp ⁇ pT FB * exp ⁇ pD FF

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Headphones And Earphones (AREA)

Claims (5)

  1. Kopfhörer mit Rauschunterdrückung (10) bestehend aus:
    - einem elektroakustischen Wandler (16), der in einem Schallwiedergabehohlraum (12) angeordnet ist;
    - mindestens einer Behandlungskette zur Rauschunterdrückung (30, 40) mit:
    - einem Mikrofon (31, 41) zum Erfassen von Umgebungsgeräuschen;
    - einem Filter zur Rauschunterdrückung (34, 44) eines Signals aus dem Mikrofon (31, 41), um ein Rauschunterdrückungssignal zu erzeugen;
    - Mittel (18, 20) zur Anwendung der Rauschunterdrückung zur Anregung des elektroakustischen Wandlers (16),
    wobei für die oder jede Behandlungskette zur Rauschunterdrückung (30, 40) der Filter zur Rauschunterdrückung (34, 44) in Reihe umfasst:
    - einen Stabilisierungsfilter (34A, 44A), dessen Übertragungsfunktion gleich dem Kehrwert (HFBcorr, HFFcorr) der Übertragungsfunktion eines verarbeiteten sekundären Pfades (Plant FB, Plant FF) ist, und
    - einen Rauschunterdrückungsfilter (34B, 44B), dessen Übertragungsfunktion eine Rauschunterdrückungsübertragungsfunktion (HFB2, HFF2) ist,
    wobei der sekundäre Pfad zwischen dem elektroakustischen Wandler (16) und dem Trommelfell des Benutzers gebildet wird, und
    die Übertragungsfunktion des verarbeiteten sekundären Pfads (Plant FB, Plant FF) die vorbestimmte Übertragungsfunktion des sekundären Pfads ist, der die Übertragungsfunktionen aller Komponenten zugeordnet sind, die das Mikrofon (31, 41) bis zum Wandler (16) in der Behandlungskette zur Rauschunterdrückung (30, 40) verarbeiten, mit Ausnahme des Filters zur Rauschunterdrückung (34, 44),
    wobei der Kopfhörer
    eine externe Behandlungskette zur Rauschunterdrückung (40) aus der mindestens einen Behandlungskette zur Rauschunterdrückung (30, 40) mit dem Mikrofon zum Erfassen von Umgebungsgeräuschen (41) umfasst, wobei das Mikrofon ein externes Mikrofon (41) ist, das außerhalb des Schallwiedergabehohlraums (12) angeordnet ist; und
    in der externen Behandlungskette zur Rauschunterdrückung (40) ist die Rauschunterdrückungsübertragungsfunktion (HFF2) gleich dem Gegenteil des Quotienten aus der vorbestimmten Übertragungsfunktion, die der passiven Dämpfung des Hohlraums (12) entspricht, durch die vorbestimmte Übertragungsfunktion zwischen der Außenhülle des Hohlraums (12) und dem externen Mikrofon (41).
  2. Kopfhörer mit Rauschunterdrückung (10) nach Anspruch 1, wobei der Stabilisierungsfilter (34A, 44A) so konstruiert ist, dass seine Übertragungsfunktion (HFBcorr, HFFcorr) gleich dem Kehrwert der Übertragungsfunktion des verarbeiteten sekundären Pfads (Plant FB, Plant FF) ist, von 5 Hz bis 50 Hz und von 1 kHz bis 10 kHz, mit einem Verstärkungsfehler von 5 dB und einer Phasenverschiebung von +45 bis -45° gegenüber der linear korrigierten Phase aufgrund der reinen Verzögerung, die aus der Ausbreitung in der Luft resultiert, und der Verzögerung aufgrund der Verarbeitung.
  3. Kopfhörer mit Rauschunterdrückung (10) nach Anspruch 1 oder 2, wobei der Kopfhörer eine interne Behandlungskette zur Rauschunterdrückung (30) umfasst, wobei die mindestens eine Behandlungskette zur Rauschunterdrückung (30, 40) ein internes Mikrofon (31) aufweist, das in dem Schallwiedergabehohlraum (12) angeordnet ist.
  4. Kopfhörer mit Rauschunterdrückung (10) nach Anspruch 3, wobei in der internen Behandlungskette zur Rauschunterdrückung (30) die Rauschunterdrückungs-Transferfunktion (HFB2) eine Verstärkung von mehr als 20 dB über den gesamten Audiobereich aufweist.
  5. Kopfhörer mit Rauschunterdrückung (10) nach Anspruch 3 oder 4, wobei in der internen Behandlungskette zur Rauschunterdrückung (30) der Stabilisierungsfilter (32A) ein Integralproportionalfilter oder ein Stufenfilter ist.
EP21200269.5A 2020-10-01 2021-09-30 Kopfhörer mit geräuschreduzierung Active EP3979663B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2010064A FR3114935B1 (fr) 2020-10-01 2020-10-01 Casque audio à réducteur de bruit

Publications (2)

Publication Number Publication Date
EP3979663A1 EP3979663A1 (de) 2022-04-06
EP3979663B1 true EP3979663B1 (de) 2024-07-17

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US (1) US11678105B2 (de)
EP (1) EP3979663B1 (de)
CN (1) CN114268869B (de)
FR (1) FR3114935B1 (de)

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Publication number Priority date Publication date Assignee Title
CN115567843B (zh) * 2022-09-27 2026-02-10 立讯精密科技(南京)有限公司 具有扬声器的头戴装置及其信号处理方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008122729A (ja) 2006-11-14 2008-05-29 Sony Corp ノイズ低減装置、ノイズ低減方法、ノイズ低減プログラムおよびノイズ低減音声出力装置
EP2206358B1 (de) * 2007-09-24 2014-07-30 Sound Innovations, LLC Digitale elektronische Rauschlösch- und Kommunikationseinrichtung im Ohr
JP2010259008A (ja) * 2009-04-28 2010-11-11 Toshiba Corp 信号処理装置、音響装置及び信号処理方法
EP2830324B1 (de) * 2013-07-23 2017-01-11 Sennheiser electronic GmbH & Co. KG Kopfhörer und Headset
CN108140380B (zh) * 2015-08-20 2022-05-27 思睿逻辑国际半导体有限公司 具有部分地由固定响应滤波器提供的反馈响应的自适应消噪反馈控制器及方法
FR3044197A1 (fr) * 2015-11-19 2017-05-26 Parrot Casque audio a controle actif de bruit, controle anti-occlusion et annulation de l'attenuation passive, en fonction de la presence ou de l'absence d'une activite vocale de l'utilisateur de casque.
DE112018000717T5 (de) * 2017-02-14 2020-01-16 Avnera Corporation Verfahren, vorrichtungen, anordnungen und komponenten zur aktivitätsermittlung von nutzerstimmaktivität
CN108540895B (zh) * 2018-07-17 2019-11-08 会听声学科技（北京）有限公司 智能均衡器设计方法及具有智能均衡器的降噪耳机

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FR3114935B1 (fr) 2022-12-09
CN114268869B (zh) 2025-10-28
CN114268869A (zh) 2022-04-01
EP3979663A1 (de) 2022-04-06
FR3114935A1 (fr) 2022-04-08
US11678105B2 (en) 2023-06-13
US20220124431A1 (en) 2022-04-21

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