ATE315323T1 - DEVICE AND METHOD FOR SUPPRESSING FEEDBACK - Google Patents

DEVICE AND METHOD FOR SUPPRESSING FEEDBACK

Info

Publication number
ATE315323T1
ATE315323T1 AT03811364T AT03811364T ATE315323T1 AT E315323 T1 ATE315323 T1 AT E315323T1 AT 03811364 T AT03811364 T AT 03811364T AT 03811364 T AT03811364 T AT 03811364T AT E315323 T1 ATE315323 T1 AT E315323T1
Authority
AT
Austria
Prior art keywords
signal
loudspeaker
microphone
feedback
filter
Prior art date
Application number
AT03811364T
Other languages
German (de)
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
Application granted granted Critical
Publication of ATE315323T1 publication Critical patent/ATE315323T1/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)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Paper (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.
AT03811364T 2002-11-21 2003-11-06 DEVICE AND METHOD FOR SUPPRESSING FEEDBACK ATE315323T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10254407A DE10254407B4 (en) 2002-11-21 2002-11-21 Apparatus and method for suppressing feedback

Publications (1)

Publication Number Publication Date
ATE315323T1 true ATE315323T1 (en) 2006-02-15

Family

ID=32318607

Family Applications (1)

Application Number Title Priority Date Filing Date
AT03811364T ATE315323T1 (en) 2002-11-21 2003-11-06 DEVICE AND METHOD FOR SUPPRESSING 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
DE602006016121D1 (en) 2005-06-09 2010-09-23 Koninkl Philips Electronics Nv METHOD AND SYSTEM FOR DETERMINING THE DISTANCE 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
EP2976898B1 (en) * 2013-03-19 2017-03-08 Koninklijke Philips N.V. Method and apparatus for determining a position of a microphone
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
DK0930801T3 (en) * 1998-01-14 2009-02-23 Bernafon Ag Circuits and method for adaptive suppression of 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
EP1518441A1 (en) 2005-03-30
DE10254407B4 (en) 2006-01-26
AU2003276271A1 (en) 2004-06-15
DE50302143D1 (en) 2006-03-30
HK1072522A1 (en) 2005-08-26
EP1518441B1 (en) 2006-01-04
WO2004047484A1 (en) 2004-06-03

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