GB2326559A - Method and apparatus for the active control of sound radiated from flow ducts - Google Patents

Method and apparatus for the active control of sound radiated from flow ducts

Info

Publication number
GB2326559A
GB2326559A GB9819983A GB9819983A GB2326559A GB 2326559 A GB2326559 A GB 2326559A GB 9819983 A GB9819983 A GB 9819983A GB 9819983 A GB9819983 A GB 9819983A GB 2326559 A GB2326559 A GB 2326559A
Authority
GB
United Kingdom
Prior art keywords
active control
flow ducts
sound radiated
radiated
sound
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
GB9819983A
Other versions
GB9819983D0 (en
GB2326559B (en
Inventor
Philip Joseph
Philip Arthur Nelson
Michael John Fisher
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
Priority claimed from GBGB9605739.3A external-priority patent/GB9605739D0/en
Priority claimed from GBGB9618864.4A external-priority patent/GB9618864D0/en
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB9819983A priority Critical patent/GB2326559B/en
Priority claimed from PCT/GB1997/000624 external-priority patent/WO1997035300A1/en
Publication of GB9819983D0 publication Critical patent/GB9819983D0/en
Publication of GB2326559A publication Critical patent/GB2326559A/en
Application granted granted Critical
Publication of GB2326559B publication Critical patent/GB2326559B/en
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
    • G10K11/1787—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
    • G10K11/1785—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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/111—Directivity control or beam pattern
    • 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
    • G10K2210/112—Ducts
    • 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
    • G10K2210/119—Radiation control, e.g. control of sound radiated by vibrating structures
    • 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
    • G10K2210/128—Vehicles
    • G10K2210/1281—Aircraft, e.g. spacecraft, airplane or helicopter
    • 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
    • G10K2210/3051—Sampling, e.g. variable rate, synchronous, decimated or interpolated
    • 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
    • G10K2210/507—Flow or turbulence
GB9819983A 1996-03-19 1997-03-10 Method and apparatus for the active control of sound radiated from flow ducts Expired - Fee Related GB2326559B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9819983A GB2326559B (en) 1996-03-19 1997-03-10 Method and apparatus for the active control of sound radiated from flow ducts

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9605739.3A GB9605739D0 (en) 1996-03-19 1996-03-19 Method for active control of sound radiated from DULD
GBGB9618864.4A GB9618864D0 (en) 1996-09-10 1996-09-10 Method for the active control of sound radiated from flow ducts
PCT/GB1997/000624 WO1997035300A1 (en) 1996-03-19 1997-03-10 Method and apparatus for the active control of sound radiated from flow ducts
GB9819983A GB2326559B (en) 1996-03-19 1997-03-10 Method and apparatus for the active control of sound radiated from flow ducts

Publications (3)

Publication Number Publication Date
GB9819983D0 GB9819983D0 (en) 1998-11-04
GB2326559A true GB2326559A (en) 1998-12-23
GB2326559B GB2326559B (en) 2000-02-09

Family

ID=27268190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9819983A Expired - Fee Related GB2326559B (en) 1996-03-19 1997-03-10 Method and apparatus for the active control of sound radiated from flow ducts

Country Status (1)

Country Link
GB (1) GB2326559B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7319641B2 (en) 2001-10-11 2008-01-15 1 . . . Limited Signal processing device for acoustic transducer array

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044203A (en) * 1972-11-24 1977-08-23 National Research Development Corporation Active control of sound waves
US4171465A (en) * 1978-08-08 1979-10-16 National Research Development Corporation Active control of sound waves
FR2632473A1 (en) * 1988-06-01 1989-12-08 Saint Louis Inst DEVICES FOR ACTIVE MITIGATION OF VIBRATION, IN PARTICULAR NOISE, ARRANGED IN SERIES
US5423658A (en) * 1993-11-01 1995-06-13 General Electric Company Active noise control using noise source having adaptive resonant frequency tuning through variable ring loading

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044203A (en) * 1972-11-24 1977-08-23 National Research Development Corporation Active control of sound waves
US4171465A (en) * 1978-08-08 1979-10-16 National Research Development Corporation Active control of sound waves
FR2632473A1 (en) * 1988-06-01 1989-12-08 Saint Louis Inst DEVICES FOR ACTIVE MITIGATION OF VIBRATION, IN PARTICULAR NOISE, ARRANGED IN SERIES
US5423658A (en) * 1993-11-01 1995-06-13 General Electric Company Active noise control using noise source having adaptive resonant frequency tuning through variable ring loading

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Journal of The Acoustical Society of America, Vol.98, No.1, 1 July 1995, pages 397-402 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7319641B2 (en) 2001-10-11 2008-01-15 1 . . . Limited Signal processing device for acoustic transducer array

Also Published As

Publication number Publication date
GB9819983D0 (en) 1998-11-04
GB2326559B (en) 2000-02-09

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030310