GB9003938D0 - Noise reducing system - Google Patents

Noise reducing system

Info

Publication number
GB9003938D0
GB9003938D0 GB909003938A GB9003938A GB9003938D0 GB 9003938 D0 GB9003938 D0 GB 9003938D0 GB 909003938 A GB909003938 A GB 909003938A GB 9003938 A GB9003938 A GB 9003938A GB 9003938 D0 GB9003938 D0 GB 9003938D0
Authority
GB
United Kingdom
Prior art keywords
noise reducing
reducing system
system
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
GB909003938A
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.)
EATWELL GRAHAM P
LANGLEY ANDREW J
ROSS COLIN F
Original Assignee
EATWELL, GRAHAM P
LANGLEY, ANDREW J
ROSS, COLIN F
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 EATWELL, GRAHAM P, LANGLEY, ANDREW J, ROSS, COLIN F filed Critical EATWELL, GRAHAM P
Priority to GB909003938A priority Critical patent/GB9003938D0/en
Publication of GB9003938D0 publication Critical patent/GB9003938D0/en
Application status is Pending legal-status Critical

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods 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
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178Methods 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
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/108Communication systems, e.g. where useful sound is kept and noise is cancelled
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/108Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081Earphones, e.g. for telephones, ear protectors or headsets
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/121Rotating machines, e.g. engines, turbines, motors; Periodic or quasi-periodic signals in general
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/301Computational
    • G10K2210/3011Single acoustic input
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/301Computational
    • G10K2210/3018Correlators, e.g. convolvers or coherence calculators
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/50Miscellaneous
    • G10K2210/511Narrow band, e.g. implementations for single frequency cancellation
GB909003938A 1990-02-21 1990-02-21 Noise reducing system Pending GB9003938D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB909003938A GB9003938D0 (en) 1990-02-21 1990-02-21 Noise reducing system

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
GB909003938A GB9003938D0 (en) 1990-02-21 1990-02-21 Noise reducing system
CA002076390A CA2076390C (en) 1990-02-21 1991-02-20 Noise reducing system
DE69125601A DE69125601D1 (en) 1990-02-21 1991-02-20 Geräuschverminderndes system
AU73360/91A AU639761B2 (en) 1990-02-21 1991-02-20 Noise reducing system
EP91904859A EP0516695B1 (en) 1990-02-21 1991-02-20 Noise reducing system
DE69125601T DE69125601T2 (en) 1990-02-21 1991-02-20 Geräuschverminderndes system
JP3505505A JPH07500677A (en) 1990-02-21 1991-02-20
PCT/GB1991/000265 WO1991013429A1 (en) 1990-02-21 1991-02-20 Noise reducing system
AT91904859T AT151554T (en) 1990-02-21 1991-02-20 Geräuschverminderndes system

Publications (1)

Publication Number Publication Date
GB9003938D0 true GB9003938D0 (en) 1990-04-18

Family

ID=10671394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB909003938A Pending GB9003938D0 (en) 1990-02-21 1990-02-21 Noise reducing system

Country Status (8)

Country Link
EP (1) EP0516695B1 (en)
JP (1) JPH07500677A (en)
AT (1) AT151554T (en)
AU (1) AU639761B2 (en)
CA (1) CA2076390C (en)
DE (2) DE69125601D1 (en)
GB (1) GB9003938D0 (en)
WO (1) WO1991013429A1 (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274757A (en) * 1993-01-28 1994-08-03 Secr Defence Ear defenders employing active noise control
US5386477A (en) * 1993-02-11 1995-01-31 Digisonix, Inc. Active acoustic control system matching model reference
US5481615A (en) * 1993-04-01 1996-01-02 Noise Cancellation Technologies, Inc. Audio reproduction system
CA2647462C (en) 2006-04-01 2014-05-20 Widex A/S Hearing aid, and a method for control of adaptation rate in anti-feedback systems for hearing aids
US9818394B2 (en) 2009-11-30 2017-11-14 Graeme Colin Fuller Realisation of controller transfer function for active noise cancellation
US8929082B2 (en) 2010-05-17 2015-01-06 Thales Avionics, Inc. Airline passenger seat modular user interface device
US9487295B2 (en) 2010-11-15 2016-11-08 William James Sim Vehicle media distribution system using optical transmitters
US8908877B2 (en) 2010-12-03 2014-12-09 Cirrus Logic, Inc. Ear-coupling detection and adjustment of adaptive response in noise-canceling in personal audio devices
US9142207B2 (en) 2010-12-03 2015-09-22 Cirrus Logic, Inc. Oversight control of an adaptive noise canceler in a personal audio device
JP2014533444A (en) 2011-06-01 2014-12-11 フィテック システムズ リミテッドPhitek Systems Limited In-ear device incorporating active noise reduction
US8958571B2 (en) 2011-06-03 2015-02-17 Cirrus Logic, Inc. MIC covering detection in personal audio devices
US9325821B1 (en) 2011-09-30 2016-04-26 Cirrus Logic, Inc. Sidetone management in an adaptive noise canceling (ANC) system including secondary path modeling
US9824677B2 (en) * 2011-06-03 2017-11-21 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US9318094B2 (en) 2011-06-03 2016-04-19 Cirrus Logic, Inc. Adaptive noise canceling architecture for a personal audio device
US8948407B2 (en) 2011-06-03 2015-02-03 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US9319781B2 (en) 2012-05-10 2016-04-19 Cirrus Logic, Inc. Frequency and direction-dependent ambient sound handling in personal audio devices having adaptive noise cancellation (ANC)
US9318090B2 (en) 2012-05-10 2016-04-19 Cirrus Logic, Inc. Downlink tone detection and adaptation of a secondary path response model in an adaptive noise canceling system
US9123321B2 (en) 2012-05-10 2015-09-01 Cirrus Logic, Inc. Sequenced adaptation of anti-noise generator response and secondary path response in an adaptive noise canceling system
US9532139B1 (en) 2012-09-14 2016-12-27 Cirrus Logic, Inc. Dual-microphone frequency amplitude response self-calibration
US9369798B1 (en) 2013-03-12 2016-06-14 Cirrus Logic, Inc. Internal dynamic range control in an adaptive noise cancellation (ANC) system
US9414150B2 (en) 2013-03-14 2016-08-09 Cirrus Logic, Inc. Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
US9324311B1 (en) 2013-03-15 2016-04-26 Cirrus Logic, Inc. Robust adaptive noise canceling (ANC) in a personal audio device
US9578432B1 (en) 2013-04-24 2017-02-21 Cirrus Logic, Inc. Metric and tool to evaluate secondary path design in adaptive noise cancellation systems
US9369557B2 (en) 2014-03-05 2016-06-14 Cirrus Logic, Inc. Frequency-dependent sidetone calibration
US9319784B2 (en) 2014-04-14 2016-04-19 Cirrus Logic, Inc. Frequency-shaped noise-based adaptation of secondary path adaptive response in noise-canceling personal audio devices
KR20180044324A (en) 2015-08-20 2018-05-02 시러스 로직 인터내셔널 세미컨덕터 리미티드 A feedback adaptive noise cancellation (ANC) controller and a method having a feedback response partially provided by a fixed response filter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4654871A (en) * 1981-06-12 1987-03-31 Sound Attenuators Limited Method and apparatus for reducing repetitive noise entering the ear
GB8517716D0 (en) * 1985-07-13 1985-08-21 Plessey Co Plc Noise reduction arrangements
US4985925A (en) * 1988-06-24 1991-01-15 Sensor Electronics, Inc. Active noise reduction system

Also Published As

Publication number Publication date
AU639761B2 (en) 1993-08-05
JPH07500677A (en) 1995-01-19
CA2076390A1 (en) 1991-08-22
CA2076390C (en) 1998-07-14
AU7336091A (en) 1991-09-18
EP0516695B1 (en) 1997-04-09
AT151554T (en) 1997-04-15
DE69125601D1 (en) 1997-05-15
WO1991013429A1 (en) 1991-09-05
EP0516695A1 (en) 1992-12-09
DE69125601T2 (en) 1997-08-14

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