FR2739214B1 - Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues - Google Patents

Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues

Info

Publication number
FR2739214B1
FR2739214B1 FR9511327A FR9511327A FR2739214B1 FR 2739214 B1 FR2739214 B1 FR 2739214B1 FR 9511327 A FR9511327 A FR 9511327A FR 9511327 A FR9511327 A FR 9511327A FR 2739214 B1 FR2739214 B1 FR 2739214B1
Authority
FR
France
Prior art keywords
vibration
feedforward
frequency band
feedback
mitigation
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.)
Expired - Fee Related
Application number
FR9511327A
Other languages
English (en)
Other versions
FR2739214A1 (fr
Inventor
Christian Carme
Andre Preumont
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.)
Technofirst SA
Original Assignee
Technofirst SA
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
Priority to FR9511327A priority Critical patent/FR2739214B1/fr
Application filed by Technofirst SA filed Critical Technofirst SA
Priority to AT96932664T priority patent/ATE209813T1/de
Priority to PCT/FR1996/001512 priority patent/WO1997012359A1/fr
Priority to AU71360/96A priority patent/AU719457B2/en
Priority to EP96932664A priority patent/EP0852793B1/fr
Priority to CA002231071A priority patent/CA2231071C/fr
Priority to DE69617449T priority patent/DE69617449T2/de
Priority to US09/043,822 priority patent/US6449369B1/en
Publication of FR2739214A1 publication Critical patent/FR2739214A1/fr
Application granted granted Critical
Publication of FR2739214B1 publication Critical patent/FR2739214B1/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
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
    • G10K11/17817—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the error signals, i.e. secondary path
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17853—Methods, e.g. algorithms; Devices of the filter
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17853—Methods, e.g. algorithms; Devices of the filter
    • G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/117—Nonlinear
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3012—Algorithms
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3023—Estimation of noise, e.g. on error signals
    • G10K2210/30232—Transfer functions, e.g. impulse response
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3026—Feedback
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3027—Feedforward
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3048—Pretraining, e.g. to identify transfer functions
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3053—Speeding up computation or convergence, or decreasing the computational load
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/50—Miscellaneous
    • G10K2210/503—Diagnostics; Stability; Alarms; Failsafe
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/50—Miscellaneous
    • G10K2210/512—Wide band, e.g. non-recurring signals

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Vibration Prevention Devices (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
FR9511327A 1995-09-27 1995-09-27 Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues Expired - Fee Related FR2739214B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FR9511327A FR2739214B1 (fr) 1995-09-27 1995-09-27 Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues
PCT/FR1996/001512 WO1997012359A1 (fr) 1995-09-27 1996-09-27 Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues
AU71360/96A AU719457B2 (en) 1995-09-27 1996-09-27 Method and device for hybrid active attenuation of vibration, particularly of mechanical, acoustic or similar vibration
EP96932664A EP0852793B1 (fr) 1995-09-27 1996-09-27 Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues
AT96932664T ATE209813T1 (de) 1995-09-27 1996-09-27 Verfahren und vorrichtung für aktive hybride schwingungsdämpfung, insbesondere von mechanischen, schall- und dergleichen schwingungen
CA002231071A CA2231071C (fr) 1995-09-27 1996-09-27 Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues
DE69617449T DE69617449T2 (de) 1995-09-27 1996-09-27 Verfahren und vorrichtung für aktive hybride schwingungsdämpfung, insbesondere von mechanischen, schall- und dergleichen schwingungen
US09/043,822 US6449369B1 (en) 1995-09-27 1996-09-27 Method and device for hybrid active attenuation of vibration, particularly of mechanical, acoustic or similar vibration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9511327A FR2739214B1 (fr) 1995-09-27 1995-09-27 Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues

Publications (2)

Publication Number Publication Date
FR2739214A1 FR2739214A1 (fr) 1997-03-28
FR2739214B1 true FR2739214B1 (fr) 1997-12-19

Family

ID=9482962

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9511327A Expired - Fee Related FR2739214B1 (fr) 1995-09-27 1995-09-27 Procede et dispositif d'attenuation active hybride de vibrations, notamment de vibrations mecaniques, sonores ou analogues

Country Status (8)

Country Link
US (1) US6449369B1 (fr)
EP (1) EP0852793B1 (fr)
AT (1) ATE209813T1 (fr)
AU (1) AU719457B2 (fr)
CA (1) CA2231071C (fr)
DE (1) DE69617449T2 (fr)
FR (1) FR2739214B1 (fr)
WO (1) WO1997012359A1 (fr)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6078672A (en) * 1997-05-06 2000-06-20 Virginia Tech Intellectual Properties, Inc. Adaptive personal active noise system
FR2774796B1 (fr) * 1998-02-06 2001-10-05 Sagem Dispositif anti-bruit a detection de seuil
US20040013273A1 (en) * 2002-07-22 2004-01-22 Siemens Vdo Automotive, Inc. Calibration for an active noise control system
US20040086135A1 (en) * 2002-11-01 2004-05-06 Siemens Vdo Automotive Inc. Active noise control system using pure feedforward method with order-based offline calibration
FR2857551B1 (fr) * 2003-04-30 2007-12-28 Senneisher Electronic Gmbh & C Dispositif pour capter ou reproduire des signaux audio
GB2401744B (en) 2003-05-14 2006-02-15 Ultra Electronics Ltd An adaptive control unit with feedback compensation
US7181296B2 (en) * 2003-08-06 2007-02-20 Asml Netherlands B.V. Method of adaptive interactive learning control and a lithographic manufacturing process and apparatus employing such a method
US7308106B2 (en) * 2004-05-17 2007-12-11 Adaptive Technologies, Inc. System and method for optimized active controller design in an ANR system
DE102005016204A1 (de) * 2005-04-07 2006-10-12 Sennheiser Electronic Gmbh & Co. Kg Kopfhörer zum Anschluss an eine externe aktive Lärmkompensationsvorrichtung
WO2007013622A1 (fr) * 2005-07-29 2007-02-01 Matsushita Electric Industrial Co., Ltd. Dispositif de haut-parleur
GB2446966B (en) 2006-04-12 2010-07-07 Wolfson Microelectronics Plc Digital circuit arrangements for ambient noise-reduction
JP5564743B2 (ja) * 2006-11-13 2014-08-06 ソニー株式会社 ノイズキャンセル用のフィルタ回路、ノイズ低減信号生成方法、およびノイズキャンセリングシステム
JP2008122729A (ja) 2006-11-14 2008-05-29 Sony Corp ノイズ低減装置、ノイズ低減方法、ノイズ低減プログラムおよびノイズ低減音声出力装置
JP4506873B2 (ja) * 2008-05-08 2010-07-21 ソニー株式会社 信号処理装置、信号処理方法
US8718291B2 (en) 2011-01-05 2014-05-06 Cambridge Silicon Radio Limited ANC for BT headphones
US8693700B2 (en) * 2011-03-31 2014-04-08 Bose Corporation Adaptive feed-forward noise reduction
US9495952B2 (en) * 2011-08-08 2016-11-15 Qualcomm Incorporated Electronic devices for controlling noise
FR2983026A1 (fr) 2011-11-22 2013-05-24 Parrot Casque audio a controle actif de bruit de type non-adaptatif, pour l'ecoute d'une source musicale audio et/ou pour des fonctions de telephonie "mains-libres"
EP2677765B1 (fr) * 2012-06-20 2018-11-28 AKG Acoustics GmbH Casque à suppression active de bruit
FR3022954A1 (fr) 2014-06-30 2016-01-01 Christian Carme Installation pour la recuperation de l'energie d'une houle et/ou pour l'attenuation active de ladite houle
CN104602163B (zh) * 2014-12-31 2017-12-01 歌尔股份有限公司 主动降噪耳机及应用于该耳机的降噪控制方法和***
US11335312B2 (en) 2016-11-08 2022-05-17 Andersen Corporation Active noise cancellation systems and methods
FR3063173B1 (fr) * 2017-02-22 2019-06-07 Hyvibe Instrument de musique acoustique, perfectionne
FR3069932B1 (fr) * 2017-08-01 2019-09-06 Hyvibe Restitution sonore perfectionnee a partir d'un dispositif a actionneur mecanique vibrant
EP3788619A1 (fr) 2018-05-04 2021-03-10 Andersen Corporation Ciblage de fréquence multibande pour atténuation de bruit
US20230335100A1 (en) * 2022-04-14 2023-10-19 Airoha Technology Corp. Active noise control circuit with multiple filters connected in parallel fashion and associated method
CN114706432B (zh) * 2022-05-20 2023-04-28 哈尔滨理工大学 一种基于跨介质时延的随机微振动主动隔振控制方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025724A (en) * 1975-08-12 1977-05-24 Westinghouse Electric Corporation Noise cancellation apparatus
FR2595498B1 (fr) * 1986-03-07 1989-06-02 Centre Nat Rech Scient Procedes et dispositifs pour attenuer les bruits d'origine externe parvenant au tympan et ameliorer l'intelligibilite des communications electro-acoustiques
US5091954A (en) * 1989-03-01 1992-02-25 Sony Corporation Noise reducing receiver device
US5337366A (en) * 1992-07-07 1994-08-09 Sharp Kabushiki Kaisha Active control apparatus using adaptive digital filter
US5613009A (en) * 1992-12-16 1997-03-18 Bridgestone Corporation Method and apparatus for controlling vibration
GB2274757A (en) * 1993-01-28 1994-08-03 Secr Defence Ear defenders employing active noise control
FR2701784B1 (fr) * 1993-02-18 1995-05-12 Matra Sep Imagerie Inf Procédé et dispositif d'amortissement actif de vibrations.
US5481615A (en) * 1993-04-01 1996-01-02 Noise Cancellation Technologies, Inc. Audio reproduction system
US5425105A (en) * 1993-04-27 1995-06-13 Hughes Aircraft Company Multiple adaptive filter active noise canceller
US5452361A (en) * 1993-06-22 1995-09-19 Noise Cancellation Technologies, Inc. Reduced VLF overload susceptibility active noise cancellation headset
US5475761A (en) * 1994-01-31 1995-12-12 Noise Cancellation Technologies, Inc. Adaptive feedforward and feedback control system
US5745580A (en) * 1994-11-04 1998-04-28 Lord Corporation Reduction of computational burden of adaptively updating control filter(s) in active systems
US6085307A (en) * 1996-11-27 2000-07-04 Vlsi Technology, Inc. Multiple native instruction set master/slave processor arrangement and method thereof

Also Published As

Publication number Publication date
EP0852793B1 (fr) 2001-11-28
US6449369B1 (en) 2002-09-10
ATE209813T1 (de) 2001-12-15
CA2231071C (fr) 2009-01-27
DE69617449D1 (de) 2002-01-10
AU7136096A (en) 1997-04-17
FR2739214A1 (fr) 1997-03-28
EP0852793A1 (fr) 1998-07-15
WO1997012359A1 (fr) 1997-04-03
DE69617449T2 (de) 2002-08-01
AU719457B2 (en) 2000-05-11
CA2231071A1 (fr) 1997-04-03

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Legal Events

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ST Notification of lapse

Effective date: 20090529