GB2097629B - Methods and apparatus for active sound control - Google Patents

Methods and apparatus for active sound control

Info

Publication number
GB2097629B
GB2097629B GB8209838A GB8209838A GB2097629B GB 2097629 B GB2097629 B GB 2097629B GB 8209838 A GB8209838 A GB 8209838A GB 8209838 A GB8209838 A GB 8209838A GB 2097629 B GB2097629 B GB 2097629B
Authority
GB
United Kingdom
Prior art keywords
methods
sound control
active sound
active
control
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
Application number
GB8209838A
Other versions
GB2097629A (en
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.)
National Research Development Corp UK
National Research Development Corp of India
Original Assignee
National Research Development Corp UK
National Research Development Corp of India
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 National Research Development Corp UK, National Research Development Corp of India filed Critical National Research Development Corp UK
Priority to GB8209838A priority Critical patent/GB2097629B/en
Publication of GB2097629A publication Critical patent/GB2097629A/en
Application granted granted Critical
Publication of GB2097629B publication Critical patent/GB2097629B/en
Expired 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
    • G10K11/1781—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
    • 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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17855—Methods, e.g. algorithms; Devices for improving speed or power requirements
    • 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
    • G10K11/1787—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
    • 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
    • G10K2210/3035—Models, e.g. of the acoustic system
    • G10K2210/30351—Identification of the environment for applying appropriate model characteristics
    • 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
    • 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
    • G10K2210/3229—Transducers
    • 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
    • G10K2210/502—Ageing, e.g. of the control system

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
GB8209838A 1981-04-15 1982-04-02 Methods and apparatus for active sound control Expired GB2097629B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8209838A GB2097629B (en) 1981-04-15 1982-04-02 Methods and apparatus for active sound control

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8111906 1981-04-15
GB8209838A GB2097629B (en) 1981-04-15 1982-04-02 Methods and apparatus for active sound control

Publications (2)

Publication Number Publication Date
GB2097629A GB2097629A (en) 1982-11-03
GB2097629B true GB2097629B (en) 1984-09-26

Family

ID=26279151

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8209838A Expired GB2097629B (en) 1981-04-15 1982-04-02 Methods and apparatus for active sound control

Country Status (1)

Country Link
GB (1) GB2097629B (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001525A1 (en) * 1981-10-21 1983-04-28 Chaplin, George, Brian, Barrie Improved method and apparatus for cancelling vibrations
JPS59133595A (en) * 1982-11-26 1984-07-31 ロ−ド・コ−ポレ−シヨン Active sound attenuator
US4562589A (en) * 1982-12-15 1985-12-31 Lord Corporation Active attenuation of noise in a closed structure
FR2550903B1 (en) * 1983-08-19 1986-07-25 Electricite De France METHOD AND DEVICE FOR CONTROLLING AND REGULATING ELECTROACOUSTIC CHAIN
GB2149273A (en) * 1983-11-02 1985-06-05 British Gas Corp Active control of flame noise
GB8404494D0 (en) * 1984-02-21 1984-03-28 Swinbanks M A Attenuation of sound waves
GB2172470B (en) * 1985-03-16 1989-01-11 Plessey Co Plc Improvement relating to noise reduction arrangements
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
GB8610744D0 (en) * 1986-05-01 1986-06-04 Plessey Co Plc Adaptive disturbance suppression
US4837834A (en) * 1988-05-04 1989-06-06 Nelson Industries, Inc. Active acoustic attenuation system with differential filtering
JP2598483B2 (en) * 1988-09-05 1997-04-09 日立プラント建設株式会社 Electronic silencing system
US5125241A (en) * 1990-03-12 1992-06-30 Kabushiki Kaisha Toshiba Refrigerating apparatus having noise attenuation
JPH0834647B2 (en) * 1990-06-11 1996-03-29 松下電器産業株式会社 Silencer
GB9107416D0 (en) * 1991-04-09 1991-05-22 Active Noise & Vibration Tech Active noise reduction
GB9201761D0 (en) * 1992-01-28 1992-03-11 Active Noise & Vibration Tech Active cancellation
US5347586A (en) * 1992-04-28 1994-09-13 Westinghouse Electric Corporation Adaptive system for controlling noise generated by or emanating from a primary noise source
US20030112981A1 (en) * 2001-12-17 2003-06-19 Siemens Vdo Automotive, Inc. Active noise control with on-line-filtered C modeling

Also Published As

Publication number Publication date
GB2097629A (en) 1982-11-03

Similar Documents

Publication Publication Date Title
DE3279426D1 (en) Cache control method and apparatus
DE3380500D1 (en) Numerical control method and apparatus therefor
GB2099272B (en) Crop engaging apparatus and methods
ZA821287B (en) Nip control method and apparatus
EP0101955A3 (en) Path control method and apparatus
PT75426B (en) Method and filter-thickening apparatus
GB2097629B (en) Methods and apparatus for active sound control
GB2092412B (en) Method and apparatus for distributing control signals
GB2077010B (en) Microprogramme control method and apparatus therefor
JPS5686002A (en) System control method and device
GB2070828B (en) Control apparatus and methods
DE3175142D1 (en) Adaptive-predictive control method and adaptive-predictive control system
DE3262778D1 (en) Produce fumigation method and apparatus
JPS56140420A (en) Device and method for controlling signal
DE3274589D1 (en) Numerical control method and apparatus
DE3176884D1 (en) Numerical control method and apparatus
GB2110460B (en) Sound reproduction method and apparatus
DE3379749D1 (en) Sampling control method and apparatus
PT75316A (en) Irrigation apparatus and method
GB2151893B (en) Crop engaging apparatus and methods
JPS57174706A (en) Method and device for generating signal
GB2130864B (en) Crop engaging apparatus and methods
ZA816267B (en) Electro-magnetic therapeutic system and method
GB2204402B (en) Method and apparatus for audio location
GB2073079B (en) Fastening apparatus and control systems therefor

Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)