EP1542500A2 - Prothèse acoustique avec suppression de bruit et procédé correspondant pour la suppression du bruit - Google Patents

Prothèse acoustique avec suppression de bruit et procédé correspondant pour la suppression du bruit Download PDF

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Publication number
EP1542500A2
EP1542500A2 EP04026820A EP04026820A EP1542500A2 EP 1542500 A2 EP1542500 A2 EP 1542500A2 EP 04026820 A EP04026820 A EP 04026820A EP 04026820 A EP04026820 A EP 04026820A EP 1542500 A2 EP1542500 A2 EP 1542500A2
Authority
EP
European Patent Office
Prior art keywords
signal
hearing aid
transfer function
output signal
useful
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04026820A
Other languages
German (de)
English (en)
Other versions
EP1542500A3 (fr
EP1542500B1 (fr
Inventor
Joachim Dr. Eggers
Volkmar Hamacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sivantos GmbH
Original Assignee
Siemens Audiologische Technik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Audiologische Technik GmbH filed Critical Siemens Audiologische Technik GmbH
Publication of EP1542500A2 publication Critical patent/EP1542500A2/fr
Publication of EP1542500A3 publication Critical patent/EP1542500A3/fr
Application granted granted Critical
Publication of EP1542500B1 publication Critical patent/EP1542500B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility
    • 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
    • H04R25/43—Electronic input selection or mixing based on input signal analysis, e.g. mixing or selection between microphone and telecoil or between microphones with different directivity characteristics
    • 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
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing

Definitions

  • the present invention relates to a hearing aid with a Estimation device for estimating a useful signal from a disturbed input signal and a signal processing device for processing the payload signal to a payload output signal. Moreover, the present invention relates a method for suppressing noises on a Hearing aid.
  • Hearing impaired people often suffer from a reduced ability to communicate in noise.
  • To improve the signal / noise ratio are going to be procedures for some time used for noise reduction. This is done in Hearing aids with the help of one or more microphones the acoustic Signal received and electrically processed so that the signal / noise ratio is improved and then via a receiver in the ear canal a suppressed signal can be issued.
  • the acoustic signal but also directly, d. H. concurrently to an electric Processing path, enter the ear canal and so the desired Affect the influence of electrical signal processing.
  • Typical concurrent signal paths result For example, in hearing aids with open supply or at Earmolds with vent holes.
  • the noise reduction based on directional microphone method in low frequency range up to approx. 1 kHz can.
  • a generic hearing aid is for example from the Publication DE 198 13 512 A1 known.
  • the noise cancellation takes place here under the mentioned impairment.
  • the document EP 1 304 902 A1 describes a method for noise immunity of a redundant acoustic Signals in which the intensity of a disturbance is estimated and an input signal component as a function of the intensity the interference is superimposed.
  • the object of the present invention is therefore to propose a hearing aid with improved noise reduction. Likewise, an improved method for noise reduction be provided in hearing aids.
  • this object is achieved by a hearing aid with an estimating device for estimating a useful signal from a disturbed input signal and a first signal processing device for processing the wanted signal too a Nutzausgangssignal, wherein with the estimator also an interference signal from the disturbed input signal estimated is. Furthermore, the hearing aid has a second signal processing device on, with the transfer function an acoustic path that can be imitated of the interfering signal with the transfer function under formation a disturbance output signal is suitable. Subsequently is a linking device for linking the Nutzausgangssignals needed with the disturbance output signal.
  • the invention provides a method for Suppressing noise on a hearing aid Estimating a useful signal from a disturbed input signal and processing the payload signal into a payload output signal, and estimating an interfering signal from the disturbed input signal, Applying the interference signal with a transfer function, with which an acoustic path is modeled, under Formation of a disturbance output signal and linking the Useful output signal with the disturbance output signal.
  • the acoustic Path is usually in an ear canal on the hearing aid lead past. This is a relatively short distance, so that it is essential with the second signal processing device as soon as possible a compensating signal to generate the estimated noise. This can be the Sound instillation on the hearing aid over to the eardrum so far be compensated as possible.
  • the replicated transfer function may be linear. These reduces the computing time and thus optimizes the noise compensation.
  • the transfer function but also be time-varying, so that, for example, the move of the hearing aid in the ear canal are taken into account can.
  • the hearing device can have an acoustic sensor, which in the inserted into an ear canal state of Hearing aid on the eardrum facing the end of the hearing aid placeable or placed so that its signal to dynamic variation of the replicated transfer function the second signal processing device can be used. This makes it possible to audible the condition in front of the eardrum to adapt the transfer function by means of a To consider the control loop.
  • the hearing device may further comprise a coupling device, with the Nutzausgangssignal the first signal processing device to the second signal processing device for varying the replicated transfer function can be coupled.
  • the coupling factor the coupling device set in hearing aid or varied. This is beneficial if that Noise signal is strongly correlated with the useful signal, so that excessive attenuation of the useful signal can be prevented can.
  • the hearing aid shown schematically in FIG. 1 has a signal processing device 1 as the central component. This takes the further signal processing of one of the microphone or microphones 2 recorded and freed by the noise canceling device 3 of noise useful signal.
  • a useful signal N and an interference signal n are estimated from the input signal from the microphone 2 and from the plurality of microphones. While the estimated useful signal N and is further processed in the signal processing device 1, the estimated interference signal n and an estimated system transfer function H and applied.
  • the transfer function H and results from a concurrent, acoustic signal path, which can be represented by a linear acoustic system 5 with a transfer function H.
  • the input of the concurrent signal path is the same acoustic signal x , which also accommodates the microphone 2.
  • the acoustic signal xH is obtained by multiplication with the transfer function H of the linear acoustic system 5.
  • the fact that the concurrent signal path is a linear acoustic system is certainly a simplifying assumption The purpose is to make the signal processing device 4 used for estimating or simulating the concurrent signal path as simple as possible.
  • the output signal n andH at the signal processing device 4 with the transfer function H represents an estimate of the interference signal xH which enters the ear canal via the concurrent signal path.
  • the interference signal xH and the opposite-phase, estimated interference signal n andH and cancel in the ear canal and the concurrent signal path is compensated, as far as the transit time difference between the acoustic signal path and the electrical signal path allowed.
  • the hearing aid of a second embodiment of the present invention is shown schematically in FIG. Compared to the first embodiment of FIG. 1, it is considered in the second embodiment that the linear acoustic system 5 'of the concurrent acoustic signal path is not sufficiently well known in terms of time or at least in the design of the hearing aid. Therefore, the transfer function H at the signal processing device 4 'is also made time-varying. To vary the transfer function H and a microphone 7 or other sensor is used, which is to be inserted into the ear canal. The signal obtained by the microphone is subtracted from the estimated signal n andH and to obtain an error signal for adaptively adjusting the system 4 'with the transfer function H and .
  • the adaptive setting of the transfer function H and can be carried out, for example, with an (N) LMS (Normalized Least Mean Square) algorithm as long as the estimated interference signal n is sufficiently uncorrelated with the useful signal at the hearing device output.
  • the influence of the useful signal on the adaptation of the filter or the signal processing device 4 'with the transfer function H and can be reduced by selecting the useful signal with a suitably selected one System 8 with the coupling function G is filtered.
  • FIG. 3 Such a system is shown in FIG. 3 in a third exemplary embodiment.
  • the output signal of the signal processing device 1 is picked up by the coupling device 8 and multiplied by the coupling function G.
  • the resulting signal is subtracted from the microphone signal of the microphone 7 in the ear canal and the estimated interference signal n andH and already subtracted therefrom , so that an error signal of the active noise suppression is obtained.
  • This error signal is used to vary the transfer function H and in the time-variant signal processing device 4 '.
  • a useful signal which passes through the concurrent acoustic signal path in the ear canal, where it would be interpreted as an interference signal is attenuated or suppressed.
  • the signal n andH which is fed in phase opposition into the ear canal, compensates for the interference signal components xH of the acoustic signal x in the ear canal.
  • the interference suppression by directional microphone interconnections can also be made possible if concurrent signal paths do not allow this in conventional approaches.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP04026820A 2003-12-10 2004-11-11 Prothèse acoustique avec suppression de bruit et procédé correspondant pour la suppression du bruit Expired - Lifetime EP1542500B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10357800A DE10357800B3 (de) 2003-12-10 2003-12-10 Hörgerät mit Störgeräuschunterdrückung und entsprechendes Störgeräuschunterdrückungsverfahren
DE10357800 2003-12-10

Publications (3)

Publication Number Publication Date
EP1542500A2 true EP1542500A2 (fr) 2005-06-15
EP1542500A3 EP1542500A3 (fr) 2009-11-11
EP1542500B1 EP1542500B1 (fr) 2010-12-29

Family

ID=34485299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04026820A Expired - Lifetime EP1542500B1 (fr) 2003-12-10 2004-11-11 Prothèse acoustique avec suppression de bruit et procédé correspondant pour la suppression du bruit

Country Status (6)

Country Link
US (1) US7574012B2 (fr)
EP (1) EP1542500B1 (fr)
AU (1) AU2004235586B9 (fr)
DE (2) DE10357800B3 (fr)
DK (1) DK1542500T3 (fr)
ES (1) ES2358797T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009010095A1 (fr) * 2007-07-17 2009-01-22 Phonak Ag Procédé destiné à produire un signal audible par un individu
CN101547394A (zh) * 2008-02-13 2009-09-30 奥迪康有限公司 听力设备、助听器系统、操作助听器系统的方法及听力设备的使用
CN101406072B (zh) * 2006-03-31 2012-01-11 唯听助听器公司 助听器和估算助听器动态增益限度的方法
US8406441B2 (en) 2007-07-18 2013-03-26 Dietmar Ruwisch User-adaptable hearing aid comprising an initialization module

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7983433B2 (en) * 2005-11-08 2011-07-19 Think-A-Move, Ltd. Earset assembly
WO2007147049A2 (fr) * 2006-06-14 2007-12-21 Think-A-Move, Ltd. Ensemble écouteur pour le traitement de la parole
US8019107B2 (en) 2008-02-20 2011-09-13 Think-A-Move Ltd. Earset assembly having acoustic waveguide
JP4355359B1 (ja) * 2008-05-27 2009-10-28 パナソニック株式会社 マイクを外耳道開口部に設置する耳掛型補聴器
WO2011067928A1 (fr) * 2009-12-02 2011-06-09 パナソニック株式会社 Aide auditive
US8983103B2 (en) 2010-12-23 2015-03-17 Think-A-Move Ltd. Earpiece with hollow elongated member having a nonlinear portion
US10751524B2 (en) 2017-06-15 2020-08-25 Cochlear Limited Interference suppression in tissue-stimulating prostheses
DE102019213810B3 (de) 2019-09-11 2020-11-19 Sivantos Pte. Ltd. Verfahren zum Betrieb eines Hörgeräts und Hörgerät
DE102020206367A1 (de) * 2020-05-20 2021-11-25 Sivantos Pte. Ltd. Verfahren zum Betrieb eines Hörgeräts und Hörgerät
CN114598981B (zh) * 2022-05-11 2022-07-29 武汉左点科技有限公司 助听器内部扰动抑制方法及设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5402496A (en) * 1992-07-13 1995-03-28 Minnesota Mining And Manufacturing Company Auditory prosthesis, noise suppression apparatus and feedback suppression apparatus having focused adaptive filtering
KR100412171B1 (ko) * 1995-04-03 2004-04-28 코닌클리케 필립스 일렉트로닉스 엔.브이. 신호증폭시스템,신호처리시스템및출력신호도출방법
DE19813512A1 (de) * 1998-03-26 1999-06-02 Siemens Audiologische Technik Hörgerät und Verfahren zur Störgeräuschunterdrückung mit Breitbandsignalanalyse
JP3916834B2 (ja) * 2000-03-06 2007-05-23 独立行政法人科学技術振興機構 雑音が付加された周期波形の基本周期あるいは基本周波数の抽出方法
US20020150264A1 (en) * 2001-04-11 2002-10-17 Silvia Allegro Method for eliminating spurious signal components in an input signal of an auditory system, application of the method, and a hearing aid
US6741707B2 (en) * 2001-06-22 2004-05-25 Trustees Of Dartmouth College Method for tuning an adaptive leaky LMS filter
EP1304902A1 (fr) * 2001-10-22 2003-04-23 Siemens Aktiengesellschaft Procédé et dispositif pour la suppression du bruit dans un signal acoustique redondant
US6829363B2 (en) * 2002-05-16 2004-12-07 Starkey Laboratories, Inc. Hearing aid with time-varying performance

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101406072B (zh) * 2006-03-31 2012-01-11 唯听助听器公司 助听器和估算助听器动态增益限度的方法
WO2009010095A1 (fr) * 2007-07-17 2009-01-22 Phonak Ag Procédé destiné à produire un signal audible par un individu
US8867766B2 (en) 2007-07-17 2014-10-21 Phonak Ag Method for producing a signal which is audible by an individual
US8406441B2 (en) 2007-07-18 2013-03-26 Dietmar Ruwisch User-adaptable hearing aid comprising an initialization module
CN101547394A (zh) * 2008-02-13 2009-09-30 奥迪康有限公司 听力设备、助听器系统、操作助听器系统的方法及听力设备的使用
CN101547394B (zh) * 2008-02-13 2013-11-06 奥迪康有限公司 听力设备、助听器系统、操作助听器系统的方法及听力设备的使用

Also Published As

Publication number Publication date
ES2358797T3 (es) 2011-05-13
AU2004235586B9 (en) 2006-11-23
AU2004235586A1 (en) 2005-06-30
US20050147266A1 (en) 2005-07-07
DK1542500T3 (da) 2011-04-18
DE502004012054D1 (de) 2011-02-10
DE10357800B3 (de) 2005-05-25
AU2004235586B2 (en) 2006-05-04
EP1542500A3 (fr) 2009-11-11
EP1542500B1 (fr) 2010-12-29
US7574012B2 (en) 2009-08-11

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