EP0930801A3 - Schaltung und Verfahren zur adaptiven Unterdrückung einer akustischen Rückkopplung - Google Patents

Schaltung und Verfahren zur adaptiven Unterdrückung einer akustischen Rückkopplung Download PDF

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Publication number
EP0930801A3
EP0930801A3 EP98811273A EP98811273A EP0930801A3 EP 0930801 A3 EP0930801 A3 EP 0930801A3 EP 98811273 A EP98811273 A EP 98811273A EP 98811273 A EP98811273 A EP 98811273A EP 0930801 A3 EP0930801 A3 EP 0930801A3
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EP
European Patent Office
Prior art keywords
filter
decorrelation
cross
coefficients
adaptive
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Application number
EP98811273A
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English (en)
French (fr)
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EP0930801A2 (de
EP0930801B1 (de
Inventor
Remo Leber
Arthur Schaub
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Bernafon AG
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Bernafon AG
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Publication of EP0930801A3 publication Critical patent/EP0930801A3/de
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Publication of EP0930801B1 publication Critical patent/EP0930801B1/de
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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
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing

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)
  • Filters That Use Time-Delay Elements (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

Die Schaltung zur adaptiven Unterdrückung der akustischen Rückkopplung ist Bestandteil eines digitalen Hörgeräts, bestehend aus Mikrophon (1), AD-Wandler (2), Subtrahierer (3), Hörkorrektur (4). DA-Wandler (5) Hörer (6), Verzögerungselement (9), Filter (10), Aufdatierungseinheit (11). Kreuzglied-Dekorrelator (12), Kreuzglied-Filter (13) und Kontrolleinheit (14). Die akustische Übertragungsstrecke wird mit der Rückkopplungscharakteristik (7) und einem Addierer (8) modelliert. Die vorliegende Erfindung zeichnet sich durch die besondere Anordnung der Dekorrelationsfilter (12,13) aus. Ein Kreuzglied-Dekorrelator (12) ist zur Dekorrelation des echokompensierten Eingangssignals (en) angeordnet, und ein Kreuzglied-Filter (13) ist zur Dekorrelation des verzögerten Ausgangssignals (xn) mittels aus dem ersten Dekorrelationsfilter (12) stammender Koeffizienten (k n) angeordnet. Die Kreuzglied-Koeffizienten (k n) der beiden Dekorrelationsfilter (12,13) werden mittels adaptiver Dekorrelation des echokompensierten Eingangssignals (en) berechnet. Dies erlaubt maximale Kornvergenzgeschwindigkeiten bei minimalen Verzerrungen, da die Aufdatierung der Filterkoeffizienten zeitlich und frequenzmässig hauptsächlich dort stattfindet, wo die grossen Verstärkungen in der Hörkorrektur (4) auftreten.
EP98811273A 1998-01-14 1998-12-30 Schaltung und Verfahren zur adaptiven Unterdrückung einer akustischen Rückkopplung Expired - Lifetime EP0930801B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6498 1998-01-14
CH6498 1998-01-14

Publications (3)

Publication Number Publication Date
EP0930801A2 EP0930801A2 (de) 1999-07-21
EP0930801A3 true EP0930801A3 (de) 2006-05-24
EP0930801B1 EP0930801B1 (de) 2008-11-05

Family

ID=4178488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98811273A Expired - Lifetime EP0930801B1 (de) 1998-01-14 1998-12-30 Schaltung und Verfahren zur adaptiven Unterdrückung einer akustischen Rückkopplung

Country Status (5)

Country Link
US (1) US6611600B1 (de)
EP (1) EP0930801B1 (de)
AU (1) AU745946B2 (de)
DE (1) DE59814316D1 (de)
DK (1) DK0930801T3 (de)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6480610B1 (en) 1999-09-21 2002-11-12 Sonic Innovations, Inc. Subband acoustic feedback cancellation in hearing aids
EP1154674B1 (de) * 2000-02-02 2008-12-10 Bernafon AG Schaltung und Verfahren zur adaptiven Geräuschunterdrückung
US8374218B2 (en) * 2000-12-05 2013-02-12 Google Inc. Combining signals with a shuffled-hadamard function
US8385470B2 (en) * 2000-12-05 2013-02-26 Google Inc. Coding a signal with a shuffled-Hadamard function
US7545849B1 (en) 2003-03-28 2009-06-09 Google Inc. Signal spectrum spreading and combining system and method
US6829289B1 (en) * 2000-12-05 2004-12-07 Gossett And Gunter, Inc. Application of a pseudo-randomly shuffled hadamard function in a wireless CDMA system
US6982945B1 (en) 2001-01-26 2006-01-03 Google, Inc. Baseband direct sequence spread spectrum transceiver
US7453921B1 (en) * 2001-12-11 2008-11-18 Google Inc. LPC filter for removing periodic and quasi-periodic interference from spread spectrum signals
US7352833B2 (en) * 2002-11-18 2008-04-01 Google Inc. Method and system for temporal autocorrelation filtering
US7627129B2 (en) 2002-11-21 2009-12-01 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for suppressing feedback
DE10254407B4 (de) * 2002-11-21 2006-01-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Unterdrücken einer Rückkopplung
AU2003236382B2 (en) 2003-08-20 2011-02-24 Phonak Ag Feedback suppression in sound signal processing using frequency transposition
AU2004201374B2 (en) 2004-04-01 2010-12-23 Phonak Ag Audio amplification apparatus
US7756276B2 (en) 2003-08-20 2010-07-13 Phonak Ag Audio amplification apparatus
US20050147258A1 (en) * 2003-12-24 2005-07-07 Ville Myllyla Method for adjusting adaptation control of adaptive interference canceller
EP1728091A4 (de) * 2003-12-24 2013-01-09 Nokia Corp Verfahren zur effizienten strahlformung unter verwendung eines komplementärrausch-trennungsfilters
DE602004028502D1 (de) * 2004-12-22 2010-09-16 Televic Nv Verfahren und Anordnung für das Schätzen einer Raumimpulsantwort
JP2006197075A (ja) * 2005-01-12 2006-07-27 Yamaha Corp マイクロフォンおよび拡声装置
JP4215015B2 (ja) * 2005-03-18 2009-01-28 ヤマハ株式会社 ハウリングキャンセラ及びこれを備えた拡声装置
EP1793645A3 (de) 2005-11-09 2008-08-06 GPE International Limited Akustische Rückkopplungsunterdrückung für Audioamplifikationssysteme
US20070104335A1 (en) * 2005-11-09 2007-05-10 Gpe International Limited Acoustic feedback suppression for audio amplification systems
US8767972B2 (en) * 2006-08-16 2014-07-01 Apherma, Llc Auto-fit hearing aid and fitting process therefor
EP2165567B1 (de) * 2007-05-22 2010-10-06 Phonak AG Verfahren zur rückkopplungslöschung in einem hörgerät und hörgerät
EP2071873B1 (de) * 2007-12-11 2017-05-03 Bernafon AG Hörgerätsystem mit einem angepassten Filter und Messverfahren
DE102010009459B4 (de) 2010-02-26 2012-01-19 Siemens Medical Instruments Pte. Ltd. Hörvorrichtung mit parallel betriebenen Rückkopplungsreduktionsfiltern und Verfahren
WO2015044915A1 (en) 2013-09-26 2015-04-02 Universidade Do Porto Acoustic feedback cancellation based on cesptral analysis
US9380387B2 (en) 2014-08-01 2016-06-28 Klipsch Group, Inc. Phase independent surround speaker
US10751524B2 (en) * 2017-06-15 2020-08-25 Cochlear Limited Interference suppression in tissue-stimulating prostheses

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1520148A (en) * 1975-10-09 1978-08-02 Standard Telephones Cables Ltd Adaptive lattice filter
JPH02278926A (ja) * 1989-04-19 1990-11-15 Nec Corp Ｆｉｒ・ラティス混合形エコーキャンセラ
WO1993020668A1 (en) * 1992-03-31 1993-10-14 Gn Danavox A/S Hearing aid compensating for acoustic feedback
EP0585976A2 (de) * 1993-11-10 1994-03-09 Phonak Ag Hörhilfegerät mit Unterdrückung der akustischen Rückkopplung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259033A (en) 1989-08-30 1993-11-02 Gn Danavox As Hearing aid having compensation for acoustic feedback
US5680467A (en) 1992-03-31 1997-10-21 Gn Danavox A/S Hearing aid compensating for acoustic feedback
DK169958B1 (da) 1992-10-20 1995-04-10 Gn Danavox As Høreapparat med kompensation for akustisk tilbagekobling
US5991418A (en) * 1996-12-17 1999-11-23 Texas Instruments Incorporated Off-line path modeling circuitry and method for off-line feedback path modeling and off-line secondary path modeling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1520148A (en) * 1975-10-09 1978-08-02 Standard Telephones Cables Ltd Adaptive lattice filter
JPH02278926A (ja) * 1989-04-19 1990-11-15 Nec Corp Ｆｉｒ・ラティス混合形エコーキャンセラ
WO1993020668A1 (en) * 1992-03-31 1993-10-14 Gn Danavox A/S Hearing aid compensating for acoustic feedback
EP0585976A2 (de) * 1993-11-10 1994-03-09 Phonak Ag Hörhilfegerät mit Unterdrückung der akustischen Rückkopplung

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MBOUP M ET AL: "Coupled adaptive prediction and system identification: a statistical model and transient analysis", DIGITAL SIGNAL PROCESSING 2, ESTIMATION, VLSI. SAN FRANCISCO, MAR. 23, vol. VOL. 5 CONF. 17, 23 March 1992 (1992-03-23), pages IV1 - IV4, XP010059154, ISBN: 0-7803-0532-9 *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 046 (E - 1029) 4 February 1991 (1991-02-04) *

Also Published As

Publication number Publication date
DK0930801T3 (da) 2009-02-23
EP0930801A2 (de) 1999-07-21
EP0930801B1 (de) 2008-11-05
AU9826598A (en) 1999-08-05
AU745946B2 (en) 2002-04-11
US6611600B1 (en) 2003-08-26
DE59814316D1 (de) 2008-12-18

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