GB2470682B - Digital circuit arrangements for ambient noise-reduction - Google Patents

Digital circuit arrangements for ambient noise-reduction

Info

Publication number
GB2470682B
GB2470682B GB1015106A GB201015106A GB2470682B GB 2470682 B GB2470682 B GB 2470682B GB 1015106 A GB1015106 A GB 1015106A GB 201015106 A GB201015106 A GB 201015106A GB 2470682 B GB2470682 B GB 2470682B
Authority
GB
United Kingdom
Prior art keywords
reduction
digital circuit
ambient noise
circuit arrangements
arrangements
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.)
Active
Application number
GB1015106A
Other versions
GB2470682A (en
GB201015106D0 (en
Inventor
Richard Clemow
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.)
Cirrus Logic International UK Ltd
Original Assignee
Wolfson Microelectronics PLC
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 Wolfson Microelectronics PLC filed Critical Wolfson Microelectronics PLC
Priority to GB1015106A priority Critical patent/GB2470682B/en
Priority claimed from GB0920789A external-priority patent/GB2465681B/en
Publication of GB201015106D0 publication Critical patent/GB201015106D0/en
Publication of GB2470682A publication Critical patent/GB2470682A/en
Application granted granted Critical
Publication of GB2470682B publication Critical patent/GB2470682B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G10K11/17853—Methods, e.g. algorithms; Devices of the 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
    • 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
    • G10K11/1787—General system configurations
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • 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
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • 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
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • 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
GB1015106A 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction Active GB2470682B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1015106A GB2470682B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1015106A GB2470682B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB0920789A GB2465681B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction

Publications (3)

Publication Number Publication Date
GB201015106D0 GB201015106D0 (en) 2010-10-27
GB2470682A GB2470682A (en) 2010-12-01
GB2470682B true GB2470682B (en) 2011-03-30

Family

ID=43037792

Family Applications (4)

Application Number Title Priority Date Filing Date
GB1015100A Active GB2470679B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB1015105A Active GB2470681B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB1015103A Active GB2470680B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB1015106A Active GB2470682B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GB1015100A Active GB2470679B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB1015105A Active GB2470681B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB1015103A Active GB2470680B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction

Country Status (1)

Country Link
GB (4) GB2470679B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021517986A (en) 2018-02-27 2021-07-29 ハーマン ベッカー オートモーティブ システムズ ゲーエムベーハー Feedforward active noise control

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Lin, L. and Aboulnasr, T., "Adaptive Signal Processing in Subbands Using Sigma-Delta Modulation Technique", IEEE International Conference of Acoustics, Speech and Signal Processing, 1994, Vol. 3, pp 169-172 *
Minogue et al, "Adaptively Cancelling Server Fan Noise: Principles and Experiments with a Short Duct and the AD73522 dspConverter", Analog Dialogue magazine, 2000, Vol. 34, pp10-15 *

Also Published As

Publication number Publication date
GB201015105D0 (en) 2010-10-27
GB201015103D0 (en) 2010-10-27
GB2470681A (en) 2010-12-01
GB2470681B (en) 2011-04-20
GB2470679A (en) 2010-12-01
GB2470682A (en) 2010-12-01
GB2470679B (en) 2011-03-30
GB2470680A (en) 2010-12-01
GB2470680B (en) 2011-03-02
GB201015100D0 (en) 2010-10-27
GB201015106D0 (en) 2010-10-27

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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)

Free format text: REGISTERED BETWEEN 20150820 AND 20150826