EP1793645A3 - Acoustical feedback suppression for audio amplification systems - Google Patents

Acoustical feedback suppression for audio amplification systems Download PDF

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Publication number
EP1793645A3
EP1793645A3 EP06251486A EP06251486A EP1793645A3 EP 1793645 A3 EP1793645 A3 EP 1793645A3 EP 06251486 A EP06251486 A EP 06251486A EP 06251486 A EP06251486 A EP 06251486A EP 1793645 A3 EP1793645 A3 EP 1793645A3
Authority
EP
European Patent Office
Prior art keywords
frequency
feedback suppression
audio amplification
amplification systems
howling
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.)
Withdrawn
Application number
EP06251486A
Other languages
German (de)
French (fr)
Other versions
EP1793645A2 (en
Inventor
Yong c/o Room 203 14th Bld. Shi
Jing c/o Room 27N Biluo Xuan Sun
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.)
GPE International Ltd
Original Assignee
GPE International Ltd
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 GPE International Ltd filed Critical GPE International Ltd
Publication of EP1793645A2 publication Critical patent/EP1793645A2/en
Publication of EP1793645A3 publication Critical patent/EP1793645A3/en
Withdrawn legal-status Critical Current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; 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)
  • Circuit For Audible Band Transducer (AREA)

Abstract

A method of acoustic feedback suppression, comprising the steps of:-
i). obtaining digitized time-domain samples of acoustic signals,
ii). performing discrete time-frequency transformation on the digitized time-domain samples to generate a plurality of frequency bins of a frequency resolution,
iii). identifying a howling frequency bin, said howling frequency having the maximum magnitude among the plurality of frequency bins,
iv). detecting a peak frequency within said howling frequency bin for suppression, and
v). suppressing said peak frequency.
EP06251486A 2005-11-09 2006-03-21 Acoustical feedback suppression for audio amplification systems Withdrawn EP1793645A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HK05109977 2005-11-09

Publications (2)

Publication Number Publication Date
EP1793645A2 EP1793645A2 (en) 2007-06-06
EP1793645A3 true EP1793645A3 (en) 2008-08-06

Family

ID=37836754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06251486A Withdrawn EP1793645A3 (en) 2005-11-09 2006-03-21 Acoustical feedback suppression for audio amplification systems

Country Status (1)

Country Link
EP (1) EP1793645A3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2148526B1 (en) 2008-07-24 2020-08-19 Oticon A/S Spectral content modification for robust feedback channel estimation
EP3975587A1 (en) * 2009-02-03 2022-03-30 Cochlear Limited Enhanced envelope encoded tone sound processor and system
JP6669176B2 (en) * 2015-12-02 2020-03-18 株式会社ソシオネクスト Signal processing device and signal processing method
CN106653038A (en) * 2016-09-09 2017-05-10 深圳来邦科技有限公司 Sound amplifying system
CN109671445A (en) * 2018-12-28 2019-04-23 广东美电贝尔科技集团股份有限公司 A kind of suppressing method that audio system sound is uttered long and high-pitched sounds
CN110186546B (en) * 2019-05-08 2020-04-14 浙江大学 Hydrophone sensitivity free field broadband calibration method based on pink noise

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998005135A1 (en) * 1996-07-26 1998-02-05 Shure Brothers Incorporated Acoustic feedback elimination using adaptive notch filter algorithm
US6125187A (en) * 1997-10-20 2000-09-26 Sony Corporation Howling eliminating apparatus
US20030210797A1 (en) * 2002-03-13 2003-11-13 Kreifeldt Richard A. Audio feedback processing system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991020134A1 (en) 1990-06-13 1991-12-26 Sabine Musical Manufacturing Company, Inc. Method and apparatus for adaptive audio resonant frequency filtering
DK0930801T3 (en) 1998-01-14 2009-02-23 Bernafon Ag Circuits and method for adaptive suppression of acoustic feedback
FI20012313A (en) * 2001-11-26 2003-05-27 Genelec Oy A method for designing a modal equalizer modifying low frequency audio

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998005135A1 (en) * 1996-07-26 1998-02-05 Shure Brothers Incorporated Acoustic feedback elimination using adaptive notch filter algorithm
US6125187A (en) * 1997-10-20 2000-09-26 Sony Corporation Howling eliminating apparatus
US20030210797A1 (en) * 2002-03-13 2003-11-13 Kreifeldt Richard A. Audio feedback processing system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DOUGLAS F. ELLIOTT: "Handbook of Digital Signal Processing Engineering Applications", 1987, ACADEMIC PRESS INC, SAN DIEGO, ISBN: 0-12-237075-9, XP002485878, 1 *

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Publication number Publication date
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