HK1072522A1 - Device and method for suppressing a feedback - Google Patents

Device and method for suppressing a feedback

Info

Publication number
HK1072522A1
HK1072522A1 HK05104954A HK05104954A HK1072522A1 HK 1072522 A1 HK1072522 A1 HK 1072522A1 HK 05104954 A HK05104954 A HK 05104954A HK 05104954 A HK05104954 A HK 05104954A HK 1072522 A1 HK1072522 A1 HK 1072522A1
Authority
HK
Hong Kong
Prior art keywords
signal
loudspeaker
microphone
feedback
filter
Prior art date
Application number
HK05104954A
Inventor
Thomas Sporer
Christian Neubauer
Original Assignee
Fraunhofer Ges Forschung
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 Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of HK1072522A1 publication Critical patent/HK1072522A1/en

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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Neurosurgery (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Paper (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The invention relates to a device for suppressing a feedback in an environment containing a microphone (10) and a loudspeaker (13), comprising a device (20), for embedding a test signal in a loudspeaker signal, a microphone signal, or a modified microphone signal, preferably using a psychoacoustic marking threshold by means of a pseudo-noise test signal, a device (50) for determining a property of a transmission path in the environment between the loudspeaker (13) and the microphone (10), using the embedded test signal and the microphone signal, a filter (40), for filtering the loudspeaker signal, to give a filtered loudspeaker signal, whereby the filter may be adjusted with regard to the filter characteristics thereof by the determining device (50) to match the same to the properties of the transmission path and a device (30) for subtracting the filtered loudspeaker signal from the microphone signal to give a modified microphone signal in which the feedback as a result of the loudspeaker is reduced. The feedback suppression concept achieves an effective feedback suppression without a loss in audio quality in particular without detracting from the artistic work of an artist.
HK05104954A 2002-11-21 2005-06-14 Device and method for suppressing a feedback HK1072522A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10254407A DE10254407B4 (en) 2002-11-21 2002-11-21 Apparatus and method for suppressing feedback
PCT/EP2003/012437 WO2004047484A1 (en) 2002-11-21 2003-11-06 Device and method for suppressing a feedback

Publications (1)

Publication Number Publication Date
HK1072522A1 true HK1072522A1 (en) 2005-08-26

Family

ID=32318607

Family Applications (1)

Application Number Title Priority Date Filing Date
HK05104954A HK1072522A1 (en) 2002-11-21 2005-06-14 Device and method for suppressing a feedback

Country Status (6)

Country Link
EP (1) EP1518441B1 (en)
AT (1) ATE315323T1 (en)
AU (1) AU2003276271A1 (en)
DE (2) DE10254407B4 (en)
HK (1) HK1072522A1 (en)
WO (1) WO2004047484A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4215015B2 (en) * 2005-03-18 2009-01-28 ヤマハ株式会社 Howling canceller and loudspeaker equipped with the same
CN101194536B (en) * 2005-06-09 2012-11-14 皇家飞利浦电子股份有限公司 Method of and system for determining distances between loudspeakers
DE102005028742B3 (en) * 2005-06-21 2006-09-21 Siemens Audiologische Technik Gmbh Hearing aid equipment, has signal source delivering test signal that is not directly coming from input signal, where information signal is delivered by equipment such that information signal is delivered from source and used as test signal
RU2635286C2 (en) * 2013-03-19 2017-11-09 Конинклейке Филипс Н.В. Method and device for determining microphone position
CN113747336B (en) * 2021-08-27 2023-01-10 音曼（北京）科技有限公司 Method for tuning and adapting sound field in different spaces based on audio processor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55105494A (en) * 1979-02-06 1980-08-13 Mitsubishi Electric Corp Loudspeaking device
JPS58200690A (en) * 1982-05-18 1983-11-22 Nippon Telegr & Teleph Corp <Ntt> Howling preventive circuit
GB8919591D0 (en) * 1989-08-30 1989-10-11 Gn Davavox As Hearing aid having compensation for acoustic feedback
CA2100015A1 (en) * 1992-07-29 1994-01-30 Resound Corporation Auditory prosthesis with user-controlled feedback cancellation
DE59814316D1 (en) * 1998-01-14 2008-12-18 Bernafon Ag Circuit and method for adaptively suppressing acoustic feedback
US6347148B1 (en) * 1998-04-16 2002-02-12 Dspfactory Ltd. Method and apparatus for feedback reduction in acoustic systems, particularly in hearing aids
DE19933317C2 (en) * 1999-07-16 2002-07-04 Bayerische Motoren Werke Ag Method and device for determining the acoustic room properties, in particular of a passenger compartment in a motor vehicle
US6434247B1 (en) * 1999-07-30 2002-08-13 Gn Resound A/S Feedback cancellation apparatus and methods utilizing adaptive reference filter mechanisms

Also Published As

Publication number Publication date
DE10254407A1 (en) 2004-06-17
EP1518441B1 (en) 2006-01-04
AU2003276271A1 (en) 2004-06-15
WO2004047484A1 (en) 2004-06-03
DE50302143D1 (en) 2006-03-30
DE10254407B4 (en) 2006-01-26
ATE315323T1 (en) 2006-02-15
EP1518441A1 (en) 2005-03-30

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20181103