WO2003015074A1 - Systeme d'annulation active du bruit avec modelisation de trajet secondaire en ligne - Google Patents

Systeme d'annulation active du bruit avec modelisation de trajet secondaire en ligne Download PDF

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Publication number
WO2003015074A1
WO2003015074A1 PCT/SG2001/000161 SG0100161W WO03015074A1 WO 2003015074 A1 WO2003015074 A1 WO 2003015074A1 SG 0100161 W SG0100161 W SG 0100161W WO 03015074 A1 WO03015074 A1 WO 03015074A1
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Prior art keywords
signal
noise
modeling
secondary path
adaptive filter
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PCT/SG2001/000161
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English (en)
Inventor
Ming Zhang
Hui Lan
Wee Ser
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Nanyang Technological University,Centre For Signal Processing.
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Priority to PCT/SG2001/000161 priority Critical patent/WO2003015074A1/fr
Publication of WO2003015074A1 publication Critical patent/WO2003015074A1/fr

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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
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
    • 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
    • G10K11/17813—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 acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
    • G10K11/17817—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 acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the error signals, i.e. secondary path
    • 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
    • G10K11/17833—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 using a self-diagnostic function or a malfunction prevention function, e.g. detecting abnormal output levels
    • 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
    • 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
    • G10K2210/3023—Estimation of noise, e.g. on error signals
    • G10K2210/30232—Transfer functions, e.g. impulse response
    • 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
    • G10K2210/3049—Random noise used, e.g. in model identification

Definitions

  • the present invention relates to an active noise control (ANC) system which reduces overall noise level by outputting from an output transducer a canceling signal having a phase opposite to and the same amplitude as that of the noise, more particularly to an active noise control system for on-line secondary path modeling.
  • ANC active noise control
  • An active noise control system involves injecting a canceling signal having the same amplitude as that of the noise and a phase opposite to the noise so as to destructively interfere with and thus cancel an input noise.
  • an output signal is sensed by an error transducer such as a microphone which supplies an error signal to a control model which in turn supplies a secondary signal to an output transducer such as a loudspeaker which injects a canceling signal to destructively interfere with and cancel an input noise.
  • a digital signal processor being a conventional noise controller, uses an adaptive filter of the finite impulse response (FIR) type which forms a signal for canceling noise upon receiving a reference signal from an input transducer such as a microphone, detects said error signal created by said error transducer such as a microphone.
  • Said error signal is called residual noise and it is the result of cancellation.
  • said error signal has two functions: on the one hand it serves as a control signal for controlling the whole active noise control system by being fed to said elements described above and by being fed to elements still to be described. With respect to this function it is called "error signal”. On the other hand said error signal is, at the same time, the output signal of the whole. active noise control system.
  • Said digital signal processor performs a feedback control using a reference signal and said error signal. In this feedback control, furthermore the level of said error signal can be minimized by controlling the filter coefficients of said adaptive filter.
  • Said adaptive filter may use any of a variety of known and available adaptive algorithms, such as the so-called least-mean-square (LMS) algorithm. Detailed descriptions of adaptive algorithms are given in (B. Widrow et al., "Adaptive Noise Canceling: Principles and Applications", Proceedings of IEEE, vol.63, No.12, Dec. 1975).
  • U.S. Pat. No. 4,677,676 by L.J. Eriksson discloses an active noise control system. This system is a typical example of the prior art.
  • An auxiliary noise source is used to model feedback and secondary paths.
  • the auxiliary noise source is random and uncorrelated to an input noise.
  • the operation of an adaptive filter of an active noise controller affects the on-line path modeling because both the input noise and the canceling signal are the disturbances for the modeling.
  • the auxiliary noise source increases the residual noise in two aspects. Firstly the auxiliary noise contributes to the residual noise through the output transducer. Secondly the auxiliary noise is a perturbation to the operation of the controller adaptive filter, thus the residual noise increases due to degraded performance of the controller.
  • U.S. Pat No. 5,553,153 by G.P. Eatwell uses a fixed auxiliary signal for on-line secondary path modeling, which requires less computation and reduces coefficient jitter in the adaptive filter. Again, the operation of the active noise controller still affects the on-line path modeling and the auxiliary noise source still increases the residual noise due to addition of the auxiliary noise itself to the residual noise.
  • U.S. Pat No. 5,940,519 by S.M. Kuo describes a feedforward active noise control system which performs on-line feedback path modeling and on-line secondary path modeling. Although the disturbances from both the input noise and the canceling signal for the on-line modeling are reduced, the auxiliary noise source still increases the residual noise in both two aspects as stated above.
  • ANC Active noise control
  • an input transducer 1 is used for receiving and passing an input noise x(n). Said input noise x(n) propagates along a primary path 2 such as a duct or plant to generate a primary noise d(n).
  • a canceling signal y'(n) generated by an output transducer, such as a loudspeaker (in Fig. 1 shown as a second adder 31 and as a secondary path 5), is superposed with said primary noise d(n) at an error transducer (in Fig. 1 shown as a first adder 3) to generate an error signal e(n) at said first adder 3.
  • said error transducer may comprise a further A/D converter means to convert said analog error signal into said digital error signal e(n) for further processing within the active noise control system.
  • a controller adaptive filter 4 receives said input noise x(n) and generates said secondary signal y(n) to drive said output transducer.
  • a first adaptive algorithm unit 41 receives a filtered input noise x'(n) generated by a later described secondary path modeling copy unit 52 in response to said input noise x(n) which is received by said secondary path modeling copy unit 52, and a modified error signal e'(n), and updates said adaptive filter 4 by minimizing the mean square value of said error signal e(n). Said modified error signal e'(n) will later be described in detail.
  • a secondary path (labeled with the reference symbol "5") denotes a path from said secondary signal y(n) via said second adder 31 to said error signal e(n) from said error transducer.
  • a random auxiliary noise source 12 produces a uncorrelated auxiliary noise u(n) for modeling said secondary path 5 via said second adder 31.
  • Said uncorrelated auxiliary noise u(n) goes through said secondary path 5 and is (by subtraction) in addition to said secondary signal y(n) at said second adder 31.
  • Said auxiliary noise u(n) is the only input to a secondary path modeling adaptive filter 51 and thus ensures that said secondary path modeling adaptive filter 51 will correctly model said secondary path 5.
  • Said second adaptive algorithm unit 53 receives a modified uncorrelated auxiliary noise u'(n) which will later be described in detail and a modeling error signal es(n), and updates said secondary path modeling adaptive filter 51 by minimizing the mean square value of said modeling error signal es(n).
  • the coefficients of said secondary path modeling adaptive filter 51 are copied to said secondary path modeling copy unit 52 to generate said filtered input noise x'(n) for performing said filtered least mean square (FxLMS) algorithm by means of said first adaptive algorithm unit 41.
  • circuitries Three further circuitries are included to the system. These circuitries are a signal distinguishing circuitry 7, a secondary path change detection circuitry 6 and an auxiliary noise control circuitry 8.
  • the function of said signal distinguishing circuitry 7 is to reduce a disturbance to said secondary path modeling adaptive filter 51 caused by said error signal e(n) and a perturbation to said controller adaptive filter 4 caused by said auxiliary noise u(n).
  • Said signal distinguishing circuitry 7 receives said input noise x(n), a modeling output signal v'(n) from said secondary path modeling filter 51 and said error signal e(n), and generates two output signals, i.e., a modeling desired signal h(n) and a modified error signal e'(n).
  • Said modeling desired signal h(n) being used for said secondary path modeling, should be equivalent to said auxiliary noise u(n) after having passed through said secondary path 5.
  • Said modified error signal e'(n) for said controller adaptive filter 4 should be equivalent to that component in a pure error signal of the system, which is only due to said input noise x(n) (not including any signal due to said auxiliary noise u(n)).
  • Said modeling desired signal h(n) is sent to a third adder 32, which calculates the difference between said modeling desired signal h(n) and said modeling output signal v'(n), thereby generating said modeling error signal es(n).
  • the function of said secondary path change detection circuitry 6 is to detect whether a change occurs on said secondary path 5 and how big such a change is.
  • Said secondary path change detection circuitry 6 receives said input noise x(n) and said error signal e(n), and outputs said secondary path change signal k(n) to said auxiliary noise control circuitry 8.
  • Said secondary path change signal k(n) can be defined by many values.
  • FIG. 2 illustrates said signal distinguishing circuitry 7. It uses a signal distinguishing adaptive filter 701 excited by said input noise x(n) to generate an output signal g(n), which is fully correlated with said input noise x(n).
  • Two further input signals for said signal distinguishing circuitry 7 are said modeling output signal v'(n) from said secondary path modeling adaptive filter 51 and said error signal e(n).
  • Said modeling output signal v'(n) is subtracted from said error signal e(n) at a fourth adder 704 to generate said modified error signal e'(n) for said first adaptive algorithm 41, and meanwhile said modified error signal e'(n) also subtracts said output signal g(n) at a fifth adder 702 to get a signal ed(n).
  • Said signal ed(n) acts as an error signal for a third adaptive algorithm unit 703.
  • said output signal g(n) of said signal distinguishing adaptive filter 701 is subtracted from said error signal e(n) at a sixth adder 705 to generate said modeling desired signal h(n) to model said secondary path 5.
  • an active noise control system comprises the feature of a noise scheduling circuitry and preferably a norm constraint circuitry.
  • the active noise control system according to the present invention operates more efficiently and accurately than known active noise control systems.
  • the active noise control system of the present invention takes advantage of said additional circuitries.
  • the function of each of said additional circuitries is, in short words, described as follows: Said noise scheduling circuitry automatically controls the power of said auxiliary noise according to the convergence status of said ANC system, and said norm constraint circuitry also automatically avoids the over-updates of adaptive filters to prevent any divergences due to the sudden and big variation of primary path/secondary path or extended unrelated noise to error/reference microphone.
  • FIG. 1 illustrates a block diagram structure of an active noise control system with on-line secondary path modeling known in the prior art in Singapore patent application No. 2000 03730- 9.
  • FIG. 2 illustrates a signal distinguishing circuitry which is used in performing on-line secondary path modeling in the prior art .
  • FIG. 3 illustrates a block diagram structure of an active noise control system with on-line secondary path modeling in accordance with the present invention.
  • FIG. 4 illustrates a noise scheduling circuitry which is used in performing on-line secondary path modeling in the present invention.
  • FIG. 5 illustrates a norm constraint circuitry which is used in performing ANC system in the present invention.
  • FIG.3 shows the block diagram of the ANC system with on-line secondary path modeling according to a preferred embodiment of the present invention.
  • the functionality of the respective elements in the ANC system which are denoted with the same reference numerals as compared to the elements according to FIG.l is identical. With regard to those elements, it is referred to the description of FIG.l and FIG.2.
  • An input transducer 1 is used for receiving and passing an input noise x(n). Said input noise x(n) propagates along a primary path 2 such as a duct or plant to generate said primary noise d(n).
  • Said canceling signal y'(n), generated by an output transducer, which output transducer comprises a second adder 31 and a secondary path 5, is superposed with said primary noise d(n) at an error transducer, which comprises a first adder 3, to generate said error signal e(n) at said first adder 3 according to the formula e(n) d(n) - y'(n).
  • Said controller adaptive filter 4 receives said input noise x(n) and generates said secondary signal y(n) to drive said output transducer.
  • Said first adaptive algorithm unit 41 receives said filtered input noise x'(n) and said error signal e(n), and updates said adaptive filter 4 by minimizing the mean square value of said error signal e(n).
  • a random auxiliary noise source 12 produces an uncorrelated auxiliary noise u(n) for modeling said secondary path 5.
  • a scheduling circuitry 6 modulates said auxiliary noise u(n) by said modified error signal e'(n) provided by the signal distinguishing circuitry 7 and by the power of said primary noise, and then generates a scheduled auxiliary noise us(n).
  • the power of said scheduled auxiliary noise is rather big at the early stages and becomes small as the convergence of said ANC system.
  • Said scheduling circuitry 6 can automatically modulate the power of said auxiliary noise based on the convergence status of said ANC system.
  • Said scheduled auxiliary noise us(n) goes through said secondary path 5 and is (by subtraction) in addition to said secondary signal y(n) at said second adder 31.
  • Said modulated auxiliary noise us(n) is the only input to said secondary path modeling adaptive filter 51 and thus ensures that said secondary path modeling adaptive filter 51 correctly models said secondary path 5.
  • Said second adaptive algorithm unit 53 receives said uncorrelated modulated auxiliary noise us(n) and said modeling error signal es(n), and updates said secondary path modeling adaptive filter 51 by minimizing the mean square value of said modeling error signal es(n).
  • the coefficients of said secondary path modeling adaptive filter 51 are copied to a secondary path modeling copy 52 to generate said filtered input noise x'(n) for performing said FxLMS algorithm by means of said first adaptive algorithm unit 41.
  • three norm constraint circuitries 81, 82 and 83 (a first norm constraint circuitry 81, a second norm constraint circuitry 82 and a third norm constraint circuitry 83), respectively, also add signals into said ANC system.
  • a sudden and big variation occurs on the primary path 2 or the secondary path 5, or some large noise violates said input signal x(n) or said error signal e(n), it will cause over-updates of said adaptive filters, and then said ANC system suffers instability and may go to divergence.
  • Said norm constraint circuitries 81, 82 and 83 are used to avoid the over-updates of said adaptive filters 4, 51 and 701 so as to prevent said ANC system from divergence.
  • Said first norm constraint circuitry 81 is used to constrain the norm of the weight vector of said controller adaptive filter 4 by a predefined first threshold TI.
  • Said second norm constraint circuitry 82 is used to constrain the norm of the weight vector of said secondary path modeling adaptive filter 51 by a predefined second threshold T2.
  • Said third norm constraint circuitry 83 is used to constrain the norm of the weight vector of said signal distinguishing adaptive filter 701 by a predefined third threshold T3.
  • FIG. 4 illustrates said scheduling circuitry 6.
  • Said input signal x(n) goes through a first power estimation circuitry 601 to get a power signal Px(n).
  • Said modified error signal e'(n) is used to get an error power signal Pe'(n) by a second power estimation circuitry 602.
  • Said power signal Px(n) and said error power signal Pe'(n) are sent to a comparator 603 which compares said power signal Px(n) and said error power signal Pe'(n) and produces a result power signal P(n) which is equal to the smaller one, i.e.
  • the result power signal P(n) is equal to the power signal Px(n) in case that the power signal Px(n) is smaller than the error power signal Pe'(n) and the result power signal P(n) is equal to the error power signal Pe'(n) in case that the error power signal Pe'(n) is smaller than the power signal Px(n).
  • auxiliary noise u(n) and the inverse of its power 605 are multiplied together with said result power signal P(n) at a multiplier 604 to generate said scheduled auxiliary noise us(n).
  • Px(n) is the power of said input noise x(n)
  • Pu(n) is the power of said auxiliary noise u(n)
  • Pe'(n) is the power of said modified error signal e'(n).
  • FIG. 5 illustrates a norm constraint circuitry which has exact the same structure as that of the first norm constraint circuitry 81, the second norm constraint circuitry 82 and the third norm constraint circuitry 83.
  • a vector signal a(n) is inputted into a norm calculation circuitry 801 to generate a norm signal
  • and a threshold T are sent to a comparator 802 to do the comparison and get a comparison result r.
  • Said result r is described as follows:
  • an ANC system with on-line secondary path modeling that reduces the contribution of said auxiliary noise to residual noise and prevent said ANC system from divergence/instability.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention concerne un système d'annulation active du bruit (ANC) qui comporte un transducteur d'entrée, un transducteur d'erreur, un transducteur de sortie et un antibruit qui émet un signal acoustique d'annulation en opposition de phase pour atténuer le bruit d'entrée et émettre un bruit affaibli. Ce système d'annulation active du bruit effectue également une modélisation de motif secondaire en ligne. Pour ce faire, et en plus des systèmes connus, ce système d'annulation active du bruit est équipé de circuits de programmation (6), de circuits de distinction de signaux (7) ainsi que de trois circuits conformes aux normes (81, 82 et 83) ; tous ces circuits étant utilisés pour modéliser ledit chemin secondaire.
PCT/SG2001/000161 2001-08-08 2001-08-08 Systeme d'annulation active du bruit avec modelisation de trajet secondaire en ligne WO2003015074A1 (fr)

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Cited By (56)

* Cited by examiner, † Cited by third party
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FR2913521A1 (fr) * 2007-03-09 2008-09-12 Sas Rns Engineering Procede de reduction active d'une nuisance sonore.
WO2014149385A1 (fr) * 2013-03-15 2014-09-25 Cirrus Logic, Inc. Adaptation de réponse adaptative de trajet secondaire sur la base du bruit ambiant dans des dispositifs audio personnels à annulation du bruit
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
US8948407B2 (en) 2011-06-03 2015-02-03 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US9014387B2 (en) 2012-04-26 2015-04-21 Cirrus Logic, Inc. Coordinated control of adaptive noise cancellation (ANC) among earspeaker channels
US9066176B2 (en) 2013-04-15 2015-06-23 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation including dynamic bias of coefficients of an adaptive noise cancellation system
US9076427B2 (en) 2012-05-10 2015-07-07 Cirrus Logic, Inc. Error-signal content controlled adaptation of secondary and leakage path models in noise-canceling personal audio devices
US9076431B2 (en) 2011-06-03 2015-07-07 Cirrus Logic, Inc. Filter architecture for an adaptive noise canceler in a personal audio device
US9082387B2 (en) 2012-05-10 2015-07-14 Cirrus Logic, Inc. Noise burst adaptation of secondary path adaptive response in noise-canceling personal audio devices
US9094744B1 (en) 2012-09-14 2015-07-28 Cirrus Logic, Inc. Close talk detector for noise cancellation
US9106989B2 (en) 2013-03-13 2015-08-11 Cirrus Logic, Inc. Adaptive-noise canceling (ANC) effectiveness estimation and correction in a personal audio device
US9107010B2 (en) 2013-02-08 2015-08-11 Cirrus Logic, Inc. Ambient noise root mean square (RMS) detector
CN104870969A (zh) * 2012-12-13 2015-08-26 斯奈克玛 声学检测具有有源噪声控制的发动机的故障的方法和装置
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
US9142205B2 (en) 2012-04-26 2015-09-22 Cirrus Logic, Inc. Leakage-modeling adaptive noise canceling for earspeakers
US9142207B2 (en) 2010-12-03 2015-09-22 Cirrus Logic, Inc. Oversight control of an adaptive noise canceler in a personal audio device
US9215749B2 (en) 2013-03-14 2015-12-15 Cirrus Logic, Inc. Reducing an acoustic intensity vector with adaptive noise cancellation with two error microphones
US9214150B2 (en) 2011-06-03 2015-12-15 Cirrus Logic, Inc. Continuous adaptation of secondary path adaptive response in noise-canceling personal audio devices
US9264808B2 (en) 2013-06-14 2016-02-16 Cirrus Logic, Inc. Systems and methods for detection and cancellation of narrow-band noise
US9294836B2 (en) 2013-04-16 2016-03-22 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation including secondary path estimate monitoring
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
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
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)
US9318094B2 (en) 2011-06-03 2016-04-19 Cirrus Logic, Inc. Adaptive noise canceling architecture 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
US9325821B1 (en) 2011-09-30 2016-04-26 Cirrus Logic, Inc. Sidetone management in an adaptive noise canceling (ANC) system including secondary path modeling
US9369557B2 (en) 2014-03-05 2016-06-14 Cirrus Logic, Inc. Frequency-dependent sidetone calibration
US9369798B1 (en) 2013-03-12 2016-06-14 Cirrus Logic, Inc. Internal dynamic range control in an adaptive noise cancellation (ANC) system
US9392364B1 (en) 2013-08-15 2016-07-12 Cirrus Logic, Inc. Virtual microphone for adaptive noise cancellation in personal audio devices
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
US9460701B2 (en) 2013-04-17 2016-10-04 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation by biasing anti-noise level
US9467776B2 (en) 2013-03-15 2016-10-11 Cirrus Logic, Inc. Monitoring of speaker impedance to detect pressure applied between mobile device and ear
US9479860B2 (en) 2014-03-07 2016-10-25 Cirrus Logic, Inc. Systems and methods for enhancing performance of audio transducer based on detection of transducer status
US9478210B2 (en) 2013-04-17 2016-10-25 Cirrus Logic, Inc. Systems and methods for hybrid adaptive noise cancellation
US9478212B1 (en) 2014-09-03 2016-10-25 Cirrus Logic, Inc. Systems and methods for use of adaptive secondary path estimate to control equalization in an audio device
US9552805B2 (en) 2014-12-19 2017-01-24 Cirrus Logic, Inc. Systems and methods for performance and stability control for feedback adaptive noise cancellation
US9578432B1 (en) 2013-04-24 2017-02-21 Cirrus Logic, Inc. Metric and tool to evaluate secondary path design in adaptive noise cancellation systems
US9578415B1 (en) 2015-08-21 2017-02-21 Cirrus Logic, Inc. Hybrid adaptive noise cancellation system with filtered error microphone signal
US9609416B2 (en) 2014-06-09 2017-03-28 Cirrus Logic, Inc. Headphone responsive to optical signaling
US9620101B1 (en) 2013-10-08 2017-04-11 Cirrus Logic, Inc. Systems and methods for maintaining playback fidelity in an audio system with adaptive noise cancellation
US9635480B2 (en) 2013-03-15 2017-04-25 Cirrus Logic, Inc. Speaker impedance monitoring
US9648410B1 (en) 2014-03-12 2017-05-09 Cirrus Logic, Inc. Control of audio output of headphone earbuds based on the environment around the headphone earbuds
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US9704472B2 (en) 2013-12-10 2017-07-11 Cirrus Logic, Inc. Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system
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US10013966B2 (en) 2016-03-15 2018-07-03 Cirrus Logic, Inc. Systems and methods for adaptive active noise cancellation for multiple-driver personal audio device
US10026388B2 (en) 2015-08-20 2018-07-17 Cirrus Logic, Inc. Feedback adaptive noise cancellation (ANC) controller and method having a feedback response partially provided by a fixed-response filter
US10181315B2 (en) 2014-06-13 2019-01-15 Cirrus Logic, Inc. Systems and methods for selectively enabling and disabling adaptation of an adaptive noise cancellation system
US10206032B2 (en) 2013-04-10 2019-02-12 Cirrus Logic, Inc. Systems and methods for multi-mode adaptive noise cancellation for audio headsets
US10219071B2 (en) 2013-12-10 2019-02-26 Cirrus Logic, Inc. Systems and methods for bandlimiting anti-noise in personal audio devices having adaptive noise cancellation
US10382864B2 (en) 2013-12-10 2019-08-13 Cirrus Logic, Inc. Systems and methods for providing adaptive playback equalization in an audio device
US10468048B2 (en) 2011-06-03 2019-11-05 Cirrus Logic, Inc. Mic covering detection in personal audio devices
WO2021097216A1 (fr) * 2019-11-14 2021-05-20 Bose Corporation Systèmes d'annulation active du bruit avec détection de convergence
CN113470610A (zh) * 2021-06-25 2021-10-01 哈尔滨工业大学（深圳） 噪声控制方法、装置、存储介质和计算机设备
KR20220098849A (ko) * 2021-01-05 2022-07-12 포항공과대학교 산학협력단 능동 노이즈 제어 장치 및 그를 위한 가상 에러 신호의 생성 방법
CN115248976A (zh) * 2021-12-31 2022-10-28 宿迁学院 一种基于降采样稀疏fir滤波器的次级通道建模方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0759606A2 (fr) * 1995-08-21 1997-02-26 DIGISONIX, Inc. Système de commande actif, adaptatif et sélectif
US5621803A (en) * 1994-09-02 1997-04-15 Digisonix, Inc. Active attenuation system with on-line modeling of feedback path
EP0773531A2 (fr) * 1995-11-07 1997-05-14 DIGISONIX, Inc. Système de commande actif et adaptatif à sélection de fréquence

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5621803A (en) * 1994-09-02 1997-04-15 Digisonix, Inc. Active attenuation system with on-line modeling of feedback path
EP0759606A2 (fr) * 1995-08-21 1997-02-26 DIGISONIX, Inc. Système de commande actif, adaptatif et sélectif
EP0773531A2 (fr) * 1995-11-07 1997-05-14 DIGISONIX, Inc. Système de commande actif et adaptatif à sélection de fréquence

Cited By (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008125774A2 (fr) * 2007-03-09 2008-10-23 Quietys Procede de reduction active d'une nuisance sonore
WO2008125774A3 (fr) * 2007-03-09 2008-12-31 Quietys Procede de reduction active d'une nuisance sonore
US8401204B2 (en) 2007-03-09 2013-03-19 Quietys Method for the active reduction of sound disturbance
FR2913521A1 (fr) * 2007-03-09 2008-09-12 Sas Rns Engineering Procede de reduction active d'une nuisance sonore.
US9633646B2 (en) 2010-12-03 2017-04-25 Cirrus Logic, Inc Oversight control of an adaptive noise canceler in a personal audio device
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
US9646595B2 (en) 2010-12-03 2017-05-09 Cirrus Logic, Inc. Ear-coupling detection and adjustment of adaptive response in noise-canceling in personal audio devices
US9076431B2 (en) 2011-06-03 2015-07-07 Cirrus Logic, Inc. Filter architecture for an adaptive noise canceler in a personal audio device
US10249284B2 (en) 2011-06-03 2019-04-02 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US9214150B2 (en) 2011-06-03 2015-12-15 Cirrus Logic, Inc. Continuous adaptation of secondary path adaptive response in noise-canceling personal audio devices
US9368099B2 (en) 2011-06-03 2016-06-14 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US9711130B2 (en) 2011-06-03 2017-07-18 Cirrus Logic, Inc. Adaptive noise canceling architecture for a personal audio device
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)
US9824677B2 (en) 2011-06-03 2017-11-21 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US10468048B2 (en) 2011-06-03 2019-11-05 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
US9014387B2 (en) 2012-04-26 2015-04-21 Cirrus Logic, Inc. Coordinated control of adaptive noise cancellation (ANC) among earspeaker channels
US9226068B2 (en) 2012-04-26 2015-12-29 Cirrus Logic, Inc. Coordinated gain control in adaptive noise cancellation (ANC) for earspeakers
US9142205B2 (en) 2012-04-26 2015-09-22 Cirrus Logic, Inc. Leakage-modeling adaptive noise canceling for earspeakers
US9076427B2 (en) 2012-05-10 2015-07-07 Cirrus Logic, Inc. Error-signal content controlled adaptation of secondary and leakage path models in noise-canceling personal audio devices
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)
US9082387B2 (en) 2012-05-10 2015-07-14 Cirrus Logic, Inc. Noise burst adaptation of secondary path adaptive response in noise-canceling personal audio devices
US9773490B2 (en) 2012-05-10 2017-09-26 Cirrus Logic, Inc. Source audio acoustic leakage detection and management 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
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
US9721556B2 (en) 2012-05-10 2017-08-01 Cirrus Logic, Inc. Downlink tone detection and adaptation of a secondary path response model in an adaptive noise canceling system
US9773493B1 (en) 2012-09-14 2017-09-26 Cirrus Logic, Inc. Power management of adaptive noise cancellation (ANC) in a personal audio device
US9094744B1 (en) 2012-09-14 2015-07-28 Cirrus Logic, Inc. Close talk detector for noise cancellation
US9230532B1 (en) 2012-09-14 2016-01-05 Cirrus, Logic Inc. Power management of adaptive noise cancellation (ANC) in a personal audio device
US9532139B1 (en) 2012-09-14 2016-12-27 Cirrus Logic, Inc. Dual-microphone frequency amplitude response self-calibration
CN104870969A (zh) * 2012-12-13 2015-08-26 斯奈克玛 声学检测具有有源噪声控制的发动机的故障的方法和装置
US9107010B2 (en) 2013-02-08 2015-08-11 Cirrus Logic, Inc. Ambient noise root mean square (RMS) detector
US9369798B1 (en) 2013-03-12 2016-06-14 Cirrus Logic, Inc. Internal dynamic range control in an adaptive noise cancellation (ANC) system
US9106989B2 (en) 2013-03-13 2015-08-11 Cirrus Logic, Inc. Adaptive-noise canceling (ANC) effectiveness estimation and correction in a personal audio device
US9215749B2 (en) 2013-03-14 2015-12-15 Cirrus Logic, Inc. Reducing an acoustic intensity vector with adaptive noise cancellation with two error microphones
US9955250B2 (en) 2013-03-14 2018-04-24 Cirrus Logic, Inc. Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
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
US9208771B2 (en) 2013-03-15 2015-12-08 Cirrus Logic, Inc. Ambient noise-based adaptation of secondary path adaptive response in noise-canceling personal audio devices
US9635480B2 (en) 2013-03-15 2017-04-25 Cirrus Logic, Inc. Speaker impedance monitoring
US9467776B2 (en) 2013-03-15 2016-10-11 Cirrus Logic, Inc. Monitoring of speaker impedance to detect pressure applied between mobile device and ear
US9324311B1 (en) 2013-03-15 2016-04-26 Cirrus Logic, Inc. Robust adaptive noise canceling (ANC) in a personal audio device
WO2014149385A1 (fr) * 2013-03-15 2014-09-25 Cirrus Logic, Inc. Adaptation de réponse adaptative de trajet secondaire sur la base du bruit ambiant dans des dispositifs audio personnels à annulation du bruit
US9502020B1 (en) 2013-03-15 2016-11-22 Cirrus Logic, Inc. Robust adaptive noise canceling (ANC) in a personal audio device
US10206032B2 (en) 2013-04-10 2019-02-12 Cirrus Logic, Inc. Systems and methods for multi-mode adaptive noise cancellation for audio headsets
US9066176B2 (en) 2013-04-15 2015-06-23 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation including dynamic bias of coefficients of an adaptive noise cancellation system
US9294836B2 (en) 2013-04-16 2016-03-22 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation including secondary path estimate monitoring
US9462376B2 (en) 2013-04-16 2016-10-04 Cirrus Logic, Inc. Systems and methods for hybrid adaptive noise cancellation
US9478210B2 (en) 2013-04-17 2016-10-25 Cirrus Logic, Inc. Systems and methods for hybrid adaptive noise cancellation
US9460701B2 (en) 2013-04-17 2016-10-04 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation by biasing anti-noise level
US9578432B1 (en) 2013-04-24 2017-02-21 Cirrus Logic, Inc. Metric and tool to evaluate secondary path design in adaptive noise cancellation systems
US9264808B2 (en) 2013-06-14 2016-02-16 Cirrus Logic, Inc. Systems and methods for detection and cancellation of narrow-band noise
US9392364B1 (en) 2013-08-15 2016-07-12 Cirrus Logic, Inc. Virtual microphone for adaptive noise cancellation in personal audio devices
US9666176B2 (en) 2013-09-13 2017-05-30 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation by adaptively shaping internal white noise to train a secondary path
US9620101B1 (en) 2013-10-08 2017-04-11 Cirrus Logic, Inc. Systems and methods for maintaining playback fidelity in an audio system with adaptive noise cancellation
US9704472B2 (en) 2013-12-10 2017-07-11 Cirrus Logic, Inc. Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system
US10219071B2 (en) 2013-12-10 2019-02-26 Cirrus Logic, Inc. Systems and methods for bandlimiting anti-noise in personal audio devices having adaptive noise cancellation
US10382864B2 (en) 2013-12-10 2019-08-13 Cirrus Logic, Inc. Systems and methods for providing adaptive playback equalization in an audio device
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US10013966B2 (en) 2016-03-15 2018-07-03 Cirrus Logic, Inc. Systems and methods for adaptive active noise cancellation for multiple-driver personal audio device
WO2021097216A1 (fr) * 2019-11-14 2021-05-20 Bose Corporation Systèmes d'annulation active du bruit avec détection de convergence
US11164557B2 (en) 2019-11-14 2021-11-02 Bose Corporation Active noise cancellation systems with convergence detection
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