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GB8328997D0 - Active noise reduction - Google Patents

Active noise reduction

Info

Publication number
GB8328997D0
GB8328997D0 GB838328997A GB8328997A GB8328997D0 GB 8328997 D0 GB8328997 D0 GB 8328997D0 GB 838328997 A GB838328997 A GB 838328997A GB 8328997 A GB8328997 A GB 8328997A GB 8328997 D0 GB8328997 D0 GB 8328997D0
Authority
GB
United Kingdom
Prior art keywords
noise reduction
active noise
active
reduction
noise
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.)
Pending
Application number
GB838328997A
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB838328997A priority Critical patent/GB8328997D0/en
Publication of GB8328997D0 publication Critical patent/GB8328997D0/en
Priority to GB08427375A priority patent/GB2149614B/en
Pending 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
    • G10K11/17857—Geometric disposition, e.g. placement of 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
    • G10K11/1785—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
    • G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
    • 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
    • G10K2210/106—Boxes, i.e. active box covering a noise source; Enclosures
    • 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
    • G10K2210/3011—Single acoustic input
    • 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
    • G10K2210/3025—Determination of spectrum characteristics, e.g. FFT
    • 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
    • G10K2210/3032—Harmonics or sub-harmonics
    • 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
    • G10K2210/3046—Multiple acoustic inputs, multiple acoustic outputs
    • 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
    • G10K2210/3049—Random noise used, e.g. in model identification
    • 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
    • G10K2210/321—Physical
    • G10K2210/3219—Geometry of the configuration
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
GB838328997A 1983-10-31 1983-10-31 Active noise reduction Pending GB8328997D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB838328997A GB8328997D0 (en) 1983-10-31 1983-10-31 Active noise reduction
GB08427375A GB2149614B (en) 1983-10-31 1984-10-30 Active noise reduction apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB838328997A GB8328997D0 (en) 1983-10-31 1983-10-31 Active noise reduction

Publications (1)

Publication Number Publication Date
GB8328997D0 true GB8328997D0 (en) 1983-11-30

Family

ID=10550978

Family Applications (2)

Application Number Title Priority Date Filing Date
GB838328997A Pending GB8328997D0 (en) 1983-10-31 1983-10-31 Active noise reduction
GB08427375A Expired GB2149614B (en) 1983-10-31 1984-10-30 Active noise reduction apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB08427375A Expired GB2149614B (en) 1983-10-31 1984-10-30 Active noise reduction apparatus

Country Status (1)

Country Link
GB (2) GB8328997D0 (en)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8610744D0 (en) * 1986-05-01 1986-06-04 Plessey Co Plc Adaptive disturbance suppression
GB8615315D0 (en) * 1986-06-23 1986-07-30 Secr Defence Aircraft cabin noise control apparatus
US5170433A (en) * 1986-10-07 1992-12-08 Adaptive Control Limited Active vibration control
GB2203016A (en) * 1986-10-07 1988-10-05 Adaptive Control Ltd Active sound control apparatus
WO1988002912A1 (en) * 1986-10-07 1988-04-21 Adaptive Control Limited Active vibration control
DE3816921A1 (en) * 1988-05-18 1989-11-30 Bayerische Motoren Werke Ag ARRANGEMENT FOR REDUCING NOISE LEVEL IN THE INTERIOR OF A MOTOR VEHICLE
JPH083395B2 (en) * 1988-09-30 1996-01-17 株式会社東芝 Silencer for cooling system
US5029218A (en) * 1988-09-30 1991-07-02 Kabushiki Kaisha Toshiba Noise cancellor
DE4026070C2 (en) * 1989-08-22 2000-05-11 Volkswagen Ag Device for actively reducing a noise level at the location of people
JP2685917B2 (en) * 1989-08-31 1997-12-08 株式会社東芝 Silencer
GB8929358D0 (en) * 1989-12-30 1990-02-28 2020 Science Limited Active vibration reducing system
JP2590783Y2 (en) 1991-02-28 1999-02-17 株式会社トランストロン Vehicle interior noise reduction device
JPH04296897A (en) * 1991-03-27 1992-10-21 Tsudakoma Corp Noise damping device for weaving machine
JP2533695B2 (en) * 1991-04-16 1996-09-11 株式会社日立製作所 Muffled sound reduction device
JP3094517B2 (en) * 1991-06-28 2000-10-03 日産自動車株式会社 Active noise control device
US5809152A (en) * 1991-07-11 1998-09-15 Hitachi, Ltd. Apparatus for reducing noise in a closed space having divergence detector
JP2939017B2 (en) * 1991-08-30 1999-08-25 日産自動車株式会社 Active noise control device
JP2530779B2 (en) * 1991-09-05 1996-09-04 株式会社日立製作所 Noise reduction device
JP2921232B2 (en) * 1991-12-27 1999-07-19 日産自動車株式会社 Active uncomfortable wave control device
JP2876874B2 (en) * 1992-03-04 1999-03-31 日産自動車株式会社 Active noise control system for vehicles
JP2882170B2 (en) * 1992-03-19 1999-04-12 日産自動車株式会社 Active noise control device
JP3345930B2 (en) * 1993-01-06 2002-11-18 日産自動車株式会社 Active control device
DE69422033T2 (en) * 1993-04-07 2000-06-08 Noise Cancellation Technologies, Inc. HYBRID ANALOG / DIGITAL VIBRATION SUPPRESSION SYSTEM
US5848169A (en) * 1994-10-06 1998-12-08 Duke University Feedback acoustic energy dissipating device with compensator
FR2732807B1 (en) * 1995-04-04 1997-05-16 Technofirst PERSONAL ACTIVE SOUND ATTENUATION METHOD AND DEVICE, SEAT PROVIDED WITH THE CORRESPONDING DEVICE, AND ACTIVE SOUND ATTENUATION SPACE OBTAINED
FI105602B (en) * 1996-11-20 2000-09-15 Vtt Method and apparatus for attenuating sound
EP1487681B1 (en) * 2002-03-28 2006-11-15 Pirelli Tyre S.p.A. Method and system for monitoring the behaviour of a tyre during the running of a motor vehicle
US8948410B2 (en) 2008-12-18 2015-02-03 Koninklijke Philips N.V. Active audio noise cancelling
DE102010006303A1 (en) * 2010-01-30 2011-08-04 MAN Truck & Bus AG, 80995 Noise compensation device in a motor vehicle
US9445184B2 (en) 2013-12-03 2016-09-13 Bose Corporation Active noise reduction headphone
EP2884488B1 (en) * 2013-12-16 2021-03-31 Harman Becker Automotive Systems GmbH Active noise control system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001479A1 (en) * 1979-11-10 1981-05-28 Sound Attenuators Ltd The cancelling of vibrations transmitted through a fluid in a containing vessel

Also Published As

Publication number Publication date
GB2149614A (en) 1985-06-12
GB8427375D0 (en) 1984-12-05
GB2149614B (en) 1987-02-25

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