CA1299725C - Systeme d'insonorisation - Google Patents

Systeme d'insonorisation

Info

Publication number
CA1299725C
CA1299725C CA000572420A CA572420A CA1299725C CA 1299725 C CA1299725 C CA 1299725C CA 000572420 A CA000572420 A CA 000572420A CA 572420 A CA572420 A CA 572420A CA 1299725 C CA1299725 C CA 1299725C
Authority
CA
Canada
Prior art keywords
filter
feedback loop
filter means
microphone
gain
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
CA000572420A
Other languages
English (en)
Inventor
Robert Christopher Twiney
Anthony John Salloway
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.)
BAE Systems Defence Systems Ltd
Original Assignee
Siemens Plessey Electronic Systems 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
Priority claimed from GB878717043A external-priority patent/GB8717043D0/en
Priority claimed from GB878717042A external-priority patent/GB8717042D0/en
Priority claimed from GB878717040A external-priority patent/GB8717040D0/en
Application filed by Siemens Plessey Electronic Systems Ltd filed Critical Siemens Plessey Electronic Systems Ltd
Application granted granted Critical
Publication of CA1299725C publication Critical patent/CA1299725C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G10K11/1781—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
    • G10K11/17821—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 input signals only
    • G10K11/17825—Error signals
    • 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
    • G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure 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
    • 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
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • 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
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3028—Filtering, e.g. Kalman filters or special analogue or digital filters
    • 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
    • G10K2210/3039—Nonlinear, e.g. clipping, numerical truncation, thresholding or variable input and output gain
    • 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
    • G10K2210/3045—Multiple acoustic inputs, single acoustic output

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Electroluminescent Light Sources (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Noise Elimination (AREA)
  • Exhaust Silencers (AREA)
  • Networks Using Active Elements (AREA)
CA000572420A 1987-07-20 1988-07-19 Systeme d'insonorisation Expired - Fee Related CA1299725C (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB8717042 1987-07-20
GB878717043A GB8717043D0 (en) 1987-07-20 1987-07-20 Noise reduction systems
GB878717042A GB8717042D0 (en) 1987-07-20 1987-07-20 Noise reduction systems
GB8717043 1987-07-20
GB878717040A GB8717040D0 (en) 1987-07-20 1987-07-20 Noise reduction systems
GB8717040 1987-07-20

Publications (1)

Publication Number Publication Date
CA1299725C true CA1299725C (fr) 1992-04-28

Family

ID=27263515

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000572420A Expired - Fee Related CA1299725C (fr) 1987-07-20 1988-07-19 Systeme d'insonorisation

Country Status (6)

Country Link
EP (1) EP0327617B1 (fr)
AT (1) ATE82083T1 (fr)
AU (1) AU608041B2 (fr)
CA (1) CA1299725C (fr)
DE (1) DE3875717T2 (fr)
WO (1) WO1989000746A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5091954A (en) * 1989-03-01 1992-02-25 Sony Corporation Noise reducing receiver device
US5276740A (en) * 1990-01-19 1994-01-04 Sony Corporation Earphone device
EP0464220B1 (fr) * 1990-01-19 1995-09-27 Sony Corporation Casque a deux ecouteurs
US5224168A (en) * 1991-05-08 1993-06-29 Sri International Method and apparatus for the active reduction of compression waves
AU6127494A (en) * 1993-01-29 1994-08-15 Active Noise And Vibration Technologies, Inc. Earpiece for active noise cancelling headset
DE69424419T2 (de) * 1993-06-23 2001-01-04 Noise Cancellation Technologies, Inc. Aktive lärmunterdrückungsanordnung mit variabler verstärkung und verbesserter restlärmmessung
AT403417B (de) * 1995-04-25 1998-02-25 Fritz Dr Paschke Schallfiltervorrichtung
US5675658A (en) * 1995-07-27 1997-10-07 Brittain; Thomas Paige Active noise reduction headset
US20010036283A1 (en) * 2000-03-07 2001-11-01 Mark Donaldson Active noise reduction system
US8054992B2 (en) * 2006-04-24 2011-11-08 Bose Corporation High frequency compensating
US8077874B2 (en) 2006-04-24 2011-12-13 Bose Corporation Active noise reduction microphone placing
DE102009005302B4 (de) 2009-01-16 2022-01-05 Sennheiser Electronic Gmbh & Co. Kg Schutzhelm und Vorrichtung zur aktiven Störschallunterdrückung
US8345888B2 (en) * 2009-04-28 2013-01-01 Bose Corporation Digital high frequency phase compensation
US8085946B2 (en) 2009-04-28 2011-12-27 Bose Corporation ANR analysis side-chain data support
US8553900B2 (en) * 2010-05-14 2013-10-08 Creative Technology Ltd Noise reduction circuit with monitoring functionality
US11164554B2 (en) 2020-03-06 2021-11-02 Bose Corporation Wearable active noise reduction (ANR) device having low frequency feedback loop modulation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061875A (en) * 1977-02-22 1977-12-06 Stephen Freifeld Audio processor for use in high noise environments
DE3268382D1 (en) * 1981-06-12 1986-02-20 Sound Attenuators Ltd Method and apparatus for reducing repetitive noise entering the ear
ZA825676B (en) * 1981-08-11 1983-06-29 Sound Attenuators Ltd Method and apparatus for low frequency active attennuation
DE3133107A1 (de) * 1981-08-21 1983-03-10 Michael 5440 Mayen Hofmann Persoenlicher schallschutz
GB2172769B (en) * 1985-03-21 1988-07-06 Topexpress Ltd Improvements in acoustic attenuation
GB8517716D0 (en) * 1985-07-13 1985-08-21 Plessey Co Plc Noise reduction arrangements

Also Published As

Publication number Publication date
AU2071688A (en) 1989-02-13
EP0327617B1 (fr) 1992-11-04
EP0327617A1 (fr) 1989-08-16
ATE82083T1 (de) 1992-11-15
WO1989000746A1 (fr) 1989-01-26
DE3875717T2 (de) 1993-03-18
DE3875717D1 (de) 1992-12-10
AU608041B2 (en) 1991-03-21

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Legal Events

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