EP1120008A2 - Gestion de l'effet de retroaction pour prothese auditive - Google Patents

Gestion de l'effet de retroaction pour prothese auditive

Info

Publication number
EP1120008A2
EP1120008A2 EP99970256A EP99970256A EP1120008A2 EP 1120008 A2 EP1120008 A2 EP 1120008A2 EP 99970256 A EP99970256 A EP 99970256A EP 99970256 A EP99970256 A EP 99970256A EP 1120008 A2 EP1120008 A2 EP 1120008A2
Authority
EP
European Patent Office
Prior art keywords
gain
hearing aid
filter
volume control
frequency range
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
EP99970256A
Other languages
German (de)
English (en)
Other versions
EP1120008B1 (fr
Inventor
Finn Danielsen
Ulrik Skov
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.)
Oticon AS
Original Assignee
Oticon AS
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 Oticon AS filed Critical Oticon AS
Publication of EP1120008A2 publication Critical patent/EP1120008A2/fr
Application granted granted Critical
Publication of EP1120008B1 publication Critical patent/EP1120008B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/35—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using translation techniques
    • H04R25/356—Amplitude, e.g. amplitude shift or compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing

Definitions

  • the present invention relates to a method of managing acoustic feedback in hearing aids.
  • Feedback is a problem, which occurs in a hearing aid when the acoustic output signal from the hearing aid propagates beside an ear mould or through a vent and consequently enter the hearing aid microphone as an acoustic input.
  • the hereby closed acoustic loop will especially for frequencies above 1-2 kHz often cause the hearing aid to howl, which disables the function of the hearing aid.
  • Previously known methods comprise the use of a high frequency cut-off filter to reduce the gain for the feedback management.
  • This method can have the form of an isolated filter to be individually adjusted, but suffer from a drawback in that when the volume control of the hearing aid is turned down and hereby reduces the gain of the feedback frequencies, the filter is still in action reducing the high frequency gain.
  • Another known method comprises a combination of the volume control and a high frequency cut-off filter meaning that when the volume control is turned up and hereby increases the gain of the hearing aid, the filter goes gradually into action and reduces the high frequency gain. The drawbacks of this scheme being that until now this could not be individually adjusted and secondly that the steepness of this filter was a modest 6 dB/octave.
  • the objective of the present invention is to provide a method for feedback management, which reduces the feedback problems without the previously mentioned drawbacks.
  • the determining of the maximum gain before feedback occurs and the controlling the volume control is applied for several channels.
  • a 1st or preferably higher order multi channel filter can be used for feedback management and adaptation purposes. This filter has shown to possess adequate properties for the purpose of the method according to the invention.
  • the hearing aid comprises a housing containing a microphone, an amplifier in connection with the microphone, a receiver in connection with the amplifier, where the amplifier comprises a multi channel type of filter, a control system for monitoring the gain in at least one channel, and control means for controlling the volume control in the at least one channel.
  • the determining of the maximum gain before feedback occurs and the controlling the volume control is applied for several channels.
  • the multi channel filter is adapted for both feedback management and adaptation purposes.
  • FIG. 1-2 are drawings showing the function of a method according to the invention:
  • the multi channel filter has as an example been chosen to be a two channel type filter along with a suitable crossover frequency.
  • volume control comprise in this example 15 steps, each step defining a 2 dB increase or decrease of gain. All frequencies are subjected to the same increase or decrease of gain depending on the setting of the volume control.
  • VC volume control
  • FIG. 2 a situation appears, where the maximum allowable gain in the high frequency channel before feedback occurs has been determined to volume control (VC) setting -12 dB. If the user exceeds this setting of the volume control, the control system takes over and for example keeps the gain in the high frequency channel constant and allows only an increase in gain for the low frequency channel.
  • the number of channels, step size, the number of steps etc. may in this connection be chosen different from the above example.

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)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Networks Using Active Elements (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Stereophonic System (AREA)
EP99970256A 1998-10-07 1999-10-07 Gestion de l'effet de retroaction pour prothese auditive Expired - Lifetime EP1120008B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA199801274 1998-10-07
DK127498 1998-10-07
PCT/DK1999/000536 WO2000021332A2 (fr) 1998-10-07 1999-10-07 Gestion de l'effet de retroaction pour prothese auditive

Publications (2)

Publication Number Publication Date
EP1120008A2 true EP1120008A2 (fr) 2001-08-01
EP1120008B1 EP1120008B1 (fr) 2011-07-27

Family

ID=8103013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99970256A Expired - Lifetime EP1120008B1 (fr) 1998-10-07 1999-10-07 Gestion de l'effet de retroaction pour prothese auditive

Country Status (5)

Country Link
EP (1) EP1120008B1 (fr)
AT (1) ATE518383T1 (fr)
AU (1) AU5969499A (fr)
DK (1) DK1120008T3 (fr)
WO (1) WO2000021332A2 (fr)

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US6718301B1 (en) 1998-11-11 2004-04-06 Starkey Laboratories, Inc. System for measuring speech content in sound
US7010136B1 (en) 1999-02-17 2006-03-07 Micro Ear Technology, Inc. Resonant response matching circuit for hearing aid
ATE289152T1 (de) 1999-09-10 2005-02-15 Starkey Lab Inc Audiosignalverarbeitung
CA2396771A1 (fr) 2000-01-20 2001-07-26 Starkey Laboratories, Inc. Systemes pour protheses auditives
US7489790B2 (en) 2000-12-05 2009-02-10 Ami Semiconductor, Inc. Digital automatic gain control
JP4681163B2 (ja) * 2001-07-16 2011-05-11 パナソニック株式会社 ハウリング検出抑圧装置、これを備えた音響装置、及び、ハウリング検出抑圧方法
US7650004B2 (en) 2001-11-15 2010-01-19 Starkey Laboratories, Inc. Hearing aids and methods and apparatus for audio fitting thereof
US7369669B2 (en) 2002-05-15 2008-05-06 Micro Ear Technology, Inc. Diotic presentation of second-order gradient directional hearing aid signals
US6829363B2 (en) 2002-05-16 2004-12-07 Starkey Laboratories, Inc. Hearing aid with time-varying performance
US7369671B2 (en) 2002-09-16 2008-05-06 Starkey, Laboratories, Inc. Switching structures for hearing aid
US8284970B2 (en) 2002-09-16 2012-10-09 Starkey Laboratories Inc. Switching structures for hearing aid
US7010135B2 (en) 2002-10-02 2006-03-07 Phonak Ag Method to determine a feedback threshold in a hearing device
US7536022B2 (en) 2002-10-02 2009-05-19 Phonak Ag Method to determine a feedback threshold in a hearing device
AU2004201374B2 (en) 2004-04-01 2010-12-23 Phonak Ag Audio amplification apparatus
AU2003236382B2 (en) 2003-08-20 2011-02-24 Phonak Ag Feedback suppression in sound signal processing using frequency transposition
US7756276B2 (en) 2003-08-20 2010-07-13 Phonak Ag Audio amplification apparatus
US9774961B2 (en) 2005-06-05 2017-09-26 Starkey Laboratories, Inc. Hearing assistance device ear-to-ear communication using an intermediate device
US8041066B2 (en) 2007-01-03 2011-10-18 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US8208642B2 (en) 2006-07-10 2012-06-26 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
DE102006046699B3 (de) 2006-10-02 2008-01-03 Siemens Audiologische Technik Gmbh Hörvorrichtung mit unsymmetrischer Klangwaage und entsprechendes Einstellverfahren
US8359283B2 (en) 2009-08-31 2013-01-22 Starkey Laboratories, Inc. Genetic algorithms with robust rank estimation for hearing assistance devices
US8737653B2 (en) 2009-12-30 2014-05-27 Starkey Laboratories, Inc. Noise reduction system for hearing assistance devices
US8965016B1 (en) 2013-08-02 2015-02-24 Starkey Laboratories, Inc. Automatic hearing aid adaptation over time via mobile application
US10003379B2 (en) 2014-05-06 2018-06-19 Starkey Laboratories, Inc. Wireless communication with probing bandwidth

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111419A (en) * 1988-03-23 1992-05-05 Central Institute For The Deaf Electronic filters, signal conversion apparatus, hearing aids and methods
US5016280A (en) * 1988-03-23 1991-05-14 Central Institute For The Deaf Electronic filters, hearing aids and methods
DK169958B1 (da) * 1992-10-20 1995-04-10 Gn Danavox As Høreapparat med kompensation for akustisk tilbagekobling
JP3398156B2 (ja) * 1995-05-02 2003-04-21 ヴェーデクス・アクティーセルスカプ 正常な音の大きさに調整されるようにプログラム可能な又はプログラム制御される補聴器を制御するための方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0021332A2 *

Also Published As

Publication number Publication date
WO2000021332A3 (fr) 2000-07-27
DK1120008T3 (da) 2011-10-24
ATE518383T1 (de) 2011-08-15
EP1120008B1 (fr) 2011-07-27
AU5969499A (en) 2000-04-26
WO2000021332A2 (fr) 2000-04-13

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