GB2308521B - Noise cancellation apparatus - Google Patents

Noise cancellation apparatus

Info

Publication number
GB2308521B
GB2308521B GB9617828A GB9617828A GB2308521B GB 2308521 B GB2308521 B GB 2308521B GB 9617828 A GB9617828 A GB 9617828A GB 9617828 A GB9617828 A GB 9617828A GB 2308521 B GB2308521 B GB 2308521B
Authority
GB
United Kingdom
Prior art keywords
noise cancellation
cancellation apparatus
noise
cancellation
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 - Lifetime
Application number
GB9617828A
Other versions
GB9617828D0 (en
GB2308521A (en
Inventor
Steven David Massie
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.)
Roke Manor Research Ltd
Original Assignee
Roke Manor Research 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 GBGB9526420.6A external-priority patent/GB9526420D0/en
Application filed by Roke Manor Research Ltd filed Critical Roke Manor Research Ltd
Priority to GB9617828A priority Critical patent/GB2308521B/en
Publication of GB9617828D0 publication Critical patent/GB9617828D0/en
Publication of GB2308521A publication Critical patent/GB2308521A/en
Application granted granted Critical
Publication of GB2308521B publication Critical patent/GB2308521B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
    • 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
    • G10K2210/101—One dimensional
    • 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
    • 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
    • G10K2210/128—Vehicles
    • 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
    • G10K2210/3026—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
    • G10K2210/3028—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
    • G10K2210/50—Miscellaneous
    • G10K2210/505—Echo cancellation, e.g. multipath-, ghost- or reverberation-cancellation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
GB9617828A 1995-12-22 1996-08-27 Noise cancellation apparatus Expired - Lifetime GB2308521B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9617828A GB2308521B (en) 1995-12-22 1996-08-27 Noise cancellation apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9526420.6A GB9526420D0 (en) 1995-12-22 1995-12-22 Noise cancellation apparatus
GB9617828A GB2308521B (en) 1995-12-22 1996-08-27 Noise cancellation apparatus

Publications (3)

Publication Number Publication Date
GB9617828D0 GB9617828D0 (en) 1996-10-09
GB2308521A GB2308521A (en) 1997-06-25
GB2308521B true GB2308521B (en) 1999-10-13

Family

ID=26308382

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9617828A Expired - Lifetime GB2308521B (en) 1995-12-22 1996-08-27 Noise cancellation apparatus

Country Status (1)

Country Link
GB (1) GB2308521B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195360A (en) * 1973-10-16 1980-03-25 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Signal processing circuit
US4283767A (en) * 1979-05-03 1981-08-11 Raytheon Company Multiple correlator reference processor
US4388711A (en) * 1981-07-28 1983-06-14 The United States Of America As Represented By The Secretary Of The Navy Optimum flow noise cancelling hydrophone module
EP0560559A2 (en) * 1992-03-09 1993-09-15 Geco A.S. Method of cancelling turbulence noise in a fluid-filled seismic streamer
US5359663A (en) * 1993-09-02 1994-10-25 The United States Of America As Represented By The Secretary Of The Navy Method and system for suppressing noise induced in a fluid medium by a body moving therethrough
EP0681193A1 (en) * 1994-05-05 1995-11-08 Western Atlas International, Inc. Method of attenuating coherent noise in marine seismic data
WO1996010247A1 (en) * 1994-09-29 1996-04-04 The Boeing Company Active noise control in a duct with highly turbulent airflow

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195360A (en) * 1973-10-16 1980-03-25 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Signal processing circuit
US4283767A (en) * 1979-05-03 1981-08-11 Raytheon Company Multiple correlator reference processor
US4388711A (en) * 1981-07-28 1983-06-14 The United States Of America As Represented By The Secretary Of The Navy Optimum flow noise cancelling hydrophone module
EP0560559A2 (en) * 1992-03-09 1993-09-15 Geco A.S. Method of cancelling turbulence noise in a fluid-filled seismic streamer
US5359663A (en) * 1993-09-02 1994-10-25 The United States Of America As Represented By The Secretary Of The Navy Method and system for suppressing noise induced in a fluid medium by a body moving therethrough
EP0681193A1 (en) * 1994-05-05 1995-11-08 Western Atlas International, Inc. Method of attenuating coherent noise in marine seismic data
WO1996010247A1 (en) * 1994-09-29 1996-04-04 The Boeing Company Active noise control in a duct with highly turbulent airflow

Also Published As

Publication number Publication date
GB9617828D0 (en) 1996-10-09
GB2308521A (en) 1997-06-25

Similar Documents

Publication Publication Date Title
AU4235996A (en) Noise cancellation apparatus
IL118536A0 (en) Noise cancellation and noise reduction apparatus
TW371547U (en) Noise cancellation apparatus
SG53091A1 (en) Noise canceling system
AU4566696A (en) Noise canceler
AU5278698A (en) Noise canceling method and apparatus for the same
SG72717A1 (en) Mounting apparatus
EP0742678A3 (en) Noise canceling gradient microphone assembly
AU9031698A (en) Noise attenuating apparatus
EP0737022A3 (en) Device for noise reduction
GB2308248B (en) Waveform-generating apparatus
SG72711A1 (en) Component mounting apparatus
GB9624267D0 (en) Transmission apparatus having echo cancellation facility
TW379910U (en) Component mounting apparatus
GB9405211D0 (en) Noise cancellation apparatus
GB2313731B (en) Noise suppression apparatus
EP0575995A3 (en) Noise reduction apparatus
GB9511859D0 (en) Liquid-control apparatus
EP0504428A4 (en) Noise reducing apparatus
EP0742545A3 (en) Interference noise-control unit
GB2308521B (en) Noise cancellation apparatus
GB9526420D0 (en) Noise cancellation apparatus
EP0644699A3 (en) Noise reducing apparatus.
HU9501311D0 (en) Noise reducing apparatus
GB9501873D0 (en) Noise reduction system

Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20160826