CA2066624A1 - Methode et dispositif de filtrage adaptatif de signaux audio se produisant a des frequences de resonance - Google Patents

Methode et dispositif de filtrage adaptatif de signaux audio se produisant a des frequences de resonance

Info

Publication number
CA2066624A1
CA2066624A1 CA2066624A CA2066624A CA2066624A1 CA 2066624 A1 CA2066624 A1 CA 2066624A1 CA 2066624 A CA2066624 A CA 2066624A CA 2066624 A CA2066624 A CA 2066624A CA 2066624 A1 CA2066624 A1 CA 2066624A1
Authority
CA
Canada
Prior art keywords
frequency
spectrums
resonant frequency
digitized
frequency filtering
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
CA2066624A
Other languages
English (en)
Other versions
CA2066624C (fr
Inventor
Doran M. Oster
Michael P. Lewis
Timothy Jon Tucker
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.)
Sabine Musical Manufacturing Co Inc
Original Assignee
Doran M. Oster
Michael P. Lewis
Timothy Jon Tucker
Sabine Musical Manufacturing Company, Inc.
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 Doran M. Oster, Michael P. Lewis, Timothy Jon Tucker, Sabine Musical Manufacturing Company, Inc. filed Critical Doran M. Oster
Publication of CA2066624A1 publication Critical patent/CA2066624A1/fr
Application granted granted Critical
Publication of CA2066624C publication Critical patent/CA2066624C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

Des signaux audio sont numérisés (60) et une transformation de Fourier rapide (62, 240) est effectuée sur des échantillons des signaux numérisés afin de produire des spectres de fréquence correspondants. Ces spectres sont analysés, par exemple lorsqu'on détermine une ou plusieurs fréquences de crête (243) qui sont supérieures de 33 dB aux harmoniques et sous-harmoniques de la fréquence dans une multiplicité de spectres successifs, afin de détecter les fréquences de réaction résonnantes. La fréquence dérangeante est alors filtrée (316, 413) dans la plage de temporisation, soit sous la forme numérisée, soit sous la forme analogique, afin d'éliminer la réaction.
CA002066624A 1990-06-13 1991-06-12 Methode et dispositif de filtrage adaptatif de signaux audio se produisant a des frequences de resonance Expired - Fee Related CA2066624C (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US53777490A 1990-06-13 1990-06-13
US07/537,774 1990-06-13
US07/713,983 US5245665A (en) 1990-06-13 1991-06-12 Method and apparatus for adaptive audio resonant frequency filtering
US07/713,983 1991-06-12
PCT/US1991/004042 WO1991020134A1 (fr) 1990-06-13 1991-06-12 Procede et appareil de filtrage adaptatif de frequence de resonance audio

Publications (2)

Publication Number Publication Date
CA2066624A1 true CA2066624A1 (fr) 1991-12-14
CA2066624C CA2066624C (fr) 1999-02-16

Family

ID=27065609

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002066624A Expired - Fee Related CA2066624C (fr) 1990-06-13 1991-06-12 Methode et dispositif de filtrage adaptatif de signaux audio se produisant a des frequences de resonance

Country Status (6)

Country Link
US (1) US5245665A (fr)
EP (1) EP0486679B1 (fr)
AU (1) AU653736B2 (fr)
CA (1) CA2066624C (fr)
DE (1) DE69118486T2 (fr)
WO (1) WO1991020134A1 (fr)

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US6664460B1 (en) * 2001-01-05 2003-12-16 Harman International Industries, Incorporated System for customizing musical effects using digital signal processing techniques
EP1438785A2 (fr) * 2001-09-06 2004-07-21 Koninklijke Philips Electronics N.V. Procede et circuit permettant de creer une sous-harmonique d'un signal periodique
US20030138117A1 (en) * 2002-01-22 2003-07-24 Goff Eugene F. System and method for the automated detection, identification and reduction of multi-channel acoustical feedback
US7203324B2 (en) * 2002-03-13 2007-04-10 Harman International Industries, Incorporated Audio feedback processing system
CA2634328C (fr) * 2003-01-24 2011-08-16 Pratt & Whitney Canada Corp. Methode et systeme de detection et d'analyse de tendance
US7227959B2 (en) * 2003-03-10 2007-06-05 Shure Incorporated Multi-channel digital feedback reducer system
US7912228B2 (en) * 2003-07-18 2011-03-22 Volkswagen Ag Device and method for operating voice-supported systems in motor vehicles
JP4258479B2 (ja) * 2005-03-10 2009-04-30 ヤマハ株式会社 グラフィックイコライザ制御装置
US8243953B2 (en) * 2005-03-11 2012-08-14 Rane Corporation Method and apparatus for identifying a feedback frequency in a signal
US8265295B2 (en) * 2005-03-11 2012-09-11 Rane Corporation Method and apparatus for identifying feedback in a circuit
US7840014B2 (en) * 2005-04-05 2010-11-23 Roland Corporation Sound apparatus with howling prevention function
US7280958B2 (en) * 2005-09-30 2007-10-09 Motorola, Inc. Method and system for suppressing receiver audio regeneration
US20070104335A1 (en) * 2005-11-09 2007-05-10 Gpe International Limited Acoustic feedback suppression for audio amplification systems
EP1793645A3 (fr) 2005-11-09 2008-08-06 GPE International Limited Suppression de la rétroaction acoustique pour les systèmes de amplification audio
US9667365B2 (en) 2008-10-24 2017-05-30 The Nielsen Company (Us), Llc Methods and apparatus to perform audio watermarking and watermark detection and extraction
US8359205B2 (en) 2008-10-24 2013-01-22 The Nielsen Company (Us), Llc Methods and apparatus to perform audio watermarking and watermark detection and extraction
US20100141761A1 (en) * 2008-12-08 2010-06-10 Mccormack Kenneth Method and system for stabilizing video images
CN101940003A (zh) * 2009-01-30 2011-01-05 松下电器产业株式会社 振鸣抑制装置、振鸣抑制方法、程序以及集成电路
US20110015922A1 (en) * 2009-07-20 2011-01-20 Larry Joseph Kirn Speech Intelligibility Improvement Method and Apparatus
TWM390014U (en) * 2010-01-14 2010-10-01 Phonic Corp Speaker box with feedback suppression capability and mixer
CN102711006B (zh) * 2012-05-30 2017-04-05 蒋憧 一种声音采集系统
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US20150039321A1 (en) * 2013-07-31 2015-02-05 Arbitron Inc. Apparatus, System and Method for Reading Codes From Digital Audio on a Processing Device
US9351072B2 (en) * 2013-11-05 2016-05-24 Bose Corporation Multi-band harmonic discrimination for feedback suppression
JP6669176B2 (ja) * 2015-12-02 2020-03-18 株式会社ソシオネクスト 信号処理装置および信号処理方法
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Also Published As

Publication number Publication date
DE69118486D1 (de) 1996-05-09
AU8108791A (en) 1992-01-07
CA2066624C (fr) 1999-02-16
EP0486679B1 (fr) 1996-04-03
US5245665A (en) 1993-09-14
EP0486679A1 (fr) 1992-05-27
DE69118486T2 (de) 1996-12-19
WO1991020134A1 (fr) 1991-12-26
EP0486679A4 (en) 1992-12-02
AU653736B2 (en) 1994-10-13

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