EP1748678B1 - Hörvorrichtung und Verfahren zur Reduktion von Rückkopplungen - Google Patents

Hörvorrichtung und Verfahren zur Reduktion von Rückkopplungen Download PDF

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Publication number
EP1748678B1
EP1748678B1 EP06117366A EP06117366A EP1748678B1 EP 1748678 B1 EP1748678 B1 EP 1748678B1 EP 06117366 A EP06117366 A EP 06117366A EP 06117366 A EP06117366 A EP 06117366A EP 1748678 B1 EP1748678 B1 EP 1748678B1
Authority
EP
European Patent Office
Prior art keywords
sound
microphone
loudspeaker
location
hearing device
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.)
Not-in-force
Application number
EP06117366A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1748678A2 (de
EP1748678A3 (de
Inventor
Eghart Fischer
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 EP1748678A2 publication Critical patent/EP1748678A2/de
Publication of EP1748678A3 publication Critical patent/EP1748678A3/de
Application granted granted Critical
Publication of EP1748678B1 publication Critical patent/EP1748678B1/de
Anticipated expiration legal-status Critical
Not-in-force 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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers
    • 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
    • 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
    • H04R2460/11—Aspects relating to vents, e.g. shape, orientation, acoustic properties in ear tips of hearing devices to prevent occlusion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/004—Monitoring arrangements; Testing arrangements for microphones
    • H04R29/005—Microphone arrays
    • H04R29/006—Microphone matching

Definitions

  • the present invention relates to a hearing apparatus and method for reducing feedback between a loudspeaker and a plurality of microphones.
  • the present invention particularly relates to a corresponding hearing aid.
  • the device has an additional handset, which is arranged in a ventilation channel.
  • This additional receiver is located approximately in the middle of the ventilation channel and symmetrically in the ventilation channel are two microphones.
  • One of the two microphones and the handset serve to avoid direct sound entering the ear canal, and the other microphone, together with the handset, serves to avoid feedback.
  • A1 is a hearing aid with a microphone, an amplifier and a receiver that passes amplified sound to the user known.
  • a second signal path is provided with a feedback suppressing microphone which is located at a location where it receives sound from the receiver causing the feedbacks.
  • the output of this microphone is correspondingly attenuated and delayed by a time P corresponding to the effective acoustic distance between the second and the main microphone. In this way, the signal component in the signal from the main microphone that can achieve feedback or whistling can be substantially eliminated.
  • the feedback cancellation arrangement comprises two microphones as well as a loudspeaker.
  • the object of the present invention is thus to propose a hearing device with a low tendency to feedback, wherein the directional effect of the pinna is exploited and an open supply is to be ensured.
  • this object is achieved by a hearing device according to claim 1.
  • the invention provides a method according to claim 5.
  • the hearing device is designed as a hearing aid.
  • the tubular earmold is, for example, part of an otoplastic for a BTE or part of an ITE (in-the-ear hearing device).
  • the hearing device has an amplifying device, with which a sound which penetrates from the outside into the earmold can be amplified differently than a sound originating from the loudspeaker.
  • a corresponding signal processing unit is included in the amplification device, which separates the individual sound sources, so that feedback as far as possible is prevented.
  • An advanced hearing device has a third microphone, so that sound that is reflected by an eardrum can be clearly recognized.
  • This third microphone is accordingly placed in the ear canal or the earmold, so that the microphones receive a directivity in the direction of the auditory canal axis. As a result, it can be calculated from which direction the sound comes.
  • the hearing device has a tubular earmold OP.
  • This earmold OP has at its end faces in each case an opening 01, 02.
  • a loudspeaker LS is located centrally. Its main emission direction is perpendicular to the axis of the earmold OP.
  • Acoustically symmetrical to the loudspeaker LS two microphones M1 and M2 are arranged inside the earmold OP. Acoustically symmetric means the sound from the loudspeaker LS to the microphone M1 is subjected to the same transfer function as the sound from the loudspeaker LS to the microphone M2.
  • Propagation directions of the sound from the speaker LS are indicated by simple arrows.
  • FIG. 1 Furthermore, a geometric line of symmetry GS is shown, which is defined by the loudspeaker LS and to which the microphones M1 and M2 are arranged symmetrically.
  • the acoustic symmetry differs slightly from the geometric symmetry, since the hearing device or the earmold OP is located in an ear canal GG, which is completed by an eardrum TF. This results in a closed space at one end of the earmold OP, while the space at the other end of the earmold OP is open.
  • This asymmetry requires a geometric asymmetry of the locations of the microphones M1, M2 with respect to the loudspeaker LS.
  • the amplitude and phase response of the sound from the loudspeaker LS are then the same in the acoustically symmetrical arrangement in both microphones M1 and M2.
  • the microphones M1 and M2 are in FIG. 1 geometrically symmetrically drawn.
  • the specific arrangement of the two microphones M1, M2 and the handset or loudspeaker LS in the tubular earmold OP makes it possible to use signal processing algorithms which avoid the occurrence of feedback despite - or precisely because of - the spatial proximity of microphone and loudspeaker.
  • the cause lies in particular in the clear definition of the feedback path.
  • the principle according to the invention thus consists in symmetrically arranging a plurality of microphones in an earmold piece which is open on both sides.
  • a similar type of processing will now be applied to the applied by the microphones M1 and M2 obtained microphone signals. Since there are no further sound sources within the tube of the earmold OP, the sound from the loudspeaker LS can be influenced by external sound or useful sound (see double arrows in FIG FIG. 1 ). Often, the sound from the speaker can be largely removed from the overall signal being processed and amplified.
  • FIG. 2 shows the directional characteristic RC of the microphone array of FIG. 1 for the center of the earmold OP, in which the loudspeaker LS is located. This results in the highest attenuation in the 90 ° or 270 ° direction in which the loudspeaker LS is located or from which the sound of the loudspeaker arrives. The useful sound, however, which arrives from the 0 ° direction is recorded almost undamped.
  • This directional characteristic RC is in FIG. 1 also indicated in the middle of the earmold.
  • FIG. 1 is also the entire signal processing, as is typical for a hearing aid indicated. Accordingly, the signals of the microphones M1 and M2 are subjected to a so-called microphone matching MM, in which an adaptation of the amplitude and phase response of the signals takes place.
  • a downstream signal processing algorithm SA which also uses the signal of the microphone M1 for processing, generates the desired directivity. The resulting signal is supplied via a low-pass filter LP and a signal processor SP to the loudspeaker LS.
  • the microphone matching unit MM adjusts the amplitude and phase responses of the microphone signals to each other or notes their differences.
  • the signal processing algorithm SA can then be used to remove signals which have a running direction from the eardrum TF to the outwardly directed opening 01 of the earmold OP, from the useful signal. For this purpose, at least three microphone input signals are necessary.
  • the loudspeaker LS is then supplied with the reflection-free useful signal.
  • FIG. 4 again shows the directional characteristic RC of the microphone assembly of the hearing of FIG. 3 , Accordingly, not only from the direction of the loudspeaker LS, but also from the direction of reflection, high degrees of attenuation result, while the useful sound is absorbed virtually unattenuated.
  • This directional characteristic is also in FIG. 3 for the middle of the earmold OP indicated.

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)
  • Headphones And Earphones (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP06117366A 2005-07-25 2006-07-18 Hörvorrichtung und Verfahren zur Reduktion von Rückkopplungen Not-in-force EP1748678B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005034646A DE102005034646B3 (de) 2005-07-25 2005-07-25 Hörvorrichtung und Verfahren zur Reduktion von Rückkopplungen

Publications (3)

Publication Number Publication Date
EP1748678A2 EP1748678A2 (de) 2007-01-31
EP1748678A3 EP1748678A3 (de) 2009-09-23
EP1748678B1 true EP1748678B1 (de) 2011-09-07

Family

ID=37188779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06117366A Not-in-force EP1748678B1 (de) 2005-07-25 2006-07-18 Hörvorrichtung und Verfahren zur Reduktion von Rückkopplungen

Country Status (5)

Country Link
US (1) US7860263B2 (da)
EP (1) EP1748678B1 (da)
CN (1) CN1905762B (da)
DE (1) DE102005034646B3 (da)
DK (1) DK1748678T3 (da)

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US7668325B2 (en) 2005-05-03 2010-02-23 Earlens Corporation Hearing system having an open chamber for housing components and reducing the occlusion effect
US8401212B2 (en) 2007-10-12 2013-03-19 Earlens Corporation Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management
WO2018127263A2 (en) * 2017-01-03 2018-07-12 Lizn Aps Speech intelligibility enhancing system
WO2009155358A1 (en) 2008-06-17 2009-12-23 Earlens Corporation Optical electro-mechanical hearing devices with separate power and signal components
EP3509324B1 (en) 2008-09-22 2023-08-16 Earlens Corporation Balanced armature devices and methods for hearing
DE102009007079A1 (de) * 2009-02-02 2010-08-12 Siemens Medical Instruments Pte. Ltd. Verfahren zur Ermittlung des akustischen Rückkopplungsverhaltens eines Hörgeräts anhand von geometrischen Daten eines Ohrs
EP2247119A1 (de) * 2009-04-27 2010-11-03 Siemens Medical Instruments Pte. Ltd. Vorrichtung zum akustischen Analysieren einer Hörvorrichtung und Analyseverfahren
DE102009051200B4 (de) * 2009-10-29 2014-06-18 Siemens Medical Instruments Pte. Ltd. Hörgerät und Verfahren zur Rückkopplungsunterdrückung mit einem Richtmikrofon
KR20110106715A (ko) * 2010-03-23 2011-09-29 삼성전자주식회사 후방 잡음 제거 장치 및 방법
EP3758394A1 (en) 2010-12-20 2020-12-30 Earlens Corporation Anatomically customized ear canal hearing apparatus
EP2843971B1 (en) 2013-09-02 2018-11-14 Oticon A/s Hearing aid device with in-the-ear-canal microphone
US10034103B2 (en) * 2014-03-18 2018-07-24 Earlens Corporation High fidelity and reduced feedback contact hearing apparatus and methods
DK3169396T3 (da) 2014-07-14 2021-06-28 Earlens Corp Glidende forspænding og peak-begrænsning for optiske høreapparater
US9924276B2 (en) 2014-11-26 2018-03-20 Earlens Corporation Adjustable venting for hearing instruments
KR101693482B1 (ko) 2015-05-22 2017-01-06 중소기업은행 하울링 및 에코 제거 기능을 갖는 헤드셋
KR101693483B1 (ko) 2015-05-22 2017-01-06 중소기업은행 헤드셋의 하울링 및 에코 제거 방법 및 컴퓨터 프로그램
EP3139637B1 (en) 2015-09-07 2019-11-06 Oticon A/s Microphone matching unit and hearing aid
DK3888564T3 (da) 2015-10-02 2025-07-14 Earlens Corp Indretning til tilpasset afgivelse af medicin i øregangen
WO2017116791A1 (en) 2015-12-30 2017-07-06 Earlens Corporation Light based hearing systems, apparatus and methods
US10492010B2 (en) 2015-12-30 2019-11-26 Earlens Corporations Damping in contact hearing systems
US11350226B2 (en) 2015-12-30 2022-05-31 Earlens Corporation Charging protocol for rechargeable hearing systems
CN112738700A (zh) 2016-09-09 2021-04-30 伊尔兰斯公司 智能镜系统和方法
US10678502B2 (en) * 2016-10-20 2020-06-09 Qualcomm Incorporated Systems and methods for in-ear control of remote devices
WO2018093733A1 (en) 2016-11-15 2018-05-24 Earlens Corporation Improved impression procedure
US10805739B2 (en) * 2018-01-23 2020-10-13 Bose Corporation Non-occluding feedback-resistant hearing device
WO2019173470A1 (en) 2018-03-07 2019-09-12 Earlens Corporation Contact hearing device and retention structure materials
WO2019199680A1 (en) 2018-04-09 2019-10-17 Earlens Corporation Dynamic filter
EP4258695B1 (en) * 2018-12-04 2025-11-19 Oticon A/s Speaker assembly for hearing aid
DE102020200553B3 (de) * 2020-01-17 2021-05-12 Sivantos Pte. Ltd. Verfahren zur Abstimmung der jeweiligen Phasengänge eines ersten Mikrofones und eines zweiten Mikrofons

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Also Published As

Publication number Publication date
CN1905762B (zh) 2011-05-18
EP1748678A2 (de) 2007-01-31
DK1748678T3 (da) 2012-01-09
CN1905762A (zh) 2007-01-31
US7860263B2 (en) 2010-12-28
EP1748678A3 (de) 2009-09-23
US20070030990A1 (en) 2007-02-08
DE102005034646B3 (de) 2007-02-01

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