DE69132338D1 - Aktives digitales annulationssystem "virtuelle erde" - Google Patents

Aktives digitales annulationssystem "virtuelle erde"

Info

Publication number
DE69132338D1
DE69132338D1 DE69132338T DE69132338T DE69132338D1 DE 69132338 D1 DE69132338 D1 DE 69132338D1 DE 69132338 T DE69132338 T DE 69132338T DE 69132338 T DE69132338 T DE 69132338T DE 69132338 D1 DE69132338 D1 DE 69132338D1
Authority
DE
Germany
Prior art keywords
signal
adaptive filter
cancellation
virtual earth
estimated 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.)
Expired - Fee Related
Application number
DE69132338T
Other languages
English (en)
Other versions
DE69132338T2 (de
Inventor
W Ziegler
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.)
NCT Group Inc
Original Assignee
NCT Group Inc
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 NCT Group Inc filed Critical NCT Group Inc
Publication of DE69132338D1 publication Critical patent/DE69132338D1/de
Application granted granted Critical
Publication of DE69132338T2 publication Critical patent/DE69132338T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • 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
    • G10K11/17821—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 input signals only
    • G10K11/17825—Error signals
    • 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
    • G10K11/1783—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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
    • G10K11/17837—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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions by retaining part of the ambient acoustic environment, e.g. speech or alarm signals that the user needs to hear
    • 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
    • G10K11/1787—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
    • 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
    • G10K2210/3011—Single acoustic input
DE69132338T 1990-02-09 1991-02-07 Aktives digitales annulationssystem "virtuelle erde" Expired - Fee Related DE69132338T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/477,432 US5105377A (en) 1990-02-09 1990-02-09 Digital virtual earth active cancellation system
PCT/US1991/000722 WO1991012579A1 (en) 1990-02-09 1991-02-07 Digital virtual earth active cancellation system

Publications (2)

Publication Number Publication Date
DE69132338D1 true DE69132338D1 (de) 2000-08-31
DE69132338T2 DE69132338T2 (de) 2001-01-18

Family

ID=23895896

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69132338T Expired - Fee Related DE69132338T2 (de) 1990-02-09 1991-02-07 Aktives digitales annulationssystem "virtuelle erde"

Country Status (9)

Country Link
US (1) US5105377A (de)
EP (1) EP0521868B1 (de)
JP (1) JP3444877B2 (de)
KR (1) KR0136565B1 (de)
AT (1) ATE195029T1 (de)
AU (1) AU650259B2 (de)
CA (1) CA2076007C (de)
DE (1) DE69132338T2 (de)
WO (1) WO1991012579A1 (de)

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US5627746A (en) * 1992-07-14 1997-05-06 Noise Cancellation Technologies, Inc. Low cost controller
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US5623402A (en) * 1994-02-10 1997-04-22 Schenck Pegasus Corporation Multi-channel inverse control using adaptive finite impulse response filters
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US5815582A (en) * 1994-12-02 1998-09-29 Noise Cancellation Technologies, Inc. Active plus selective headset
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KR20230020709A (ko) 2021-08-04 2023-02-13 서가빈 다람쥐 케이지와 결합하는 사육 상자

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Also Published As

Publication number Publication date
EP0521868B1 (de) 2000-07-26
EP0521868A1 (de) 1993-01-13
KR920704232A (ko) 1992-12-19
DE69132338T2 (de) 2001-01-18
CA2076007C (en) 1998-09-15
WO1991012579A1 (en) 1991-08-22
AU650259B2 (en) 1994-06-16
ATE195029T1 (de) 2000-08-15
EP0521868A4 (de) 1994-02-09
CA2076007A1 (en) 1991-08-10
KR0136565B1 (ko) 1999-10-01
US5105377A (en) 1992-04-14
JP3444877B2 (ja) 2003-09-08
AU7240491A (en) 1991-09-03
JPH05503622A (ja) 1993-06-10

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8339 Ceased/non-payment of the annual fee