EP2629289B1 - Système de contrôle actif de bruit avec rétroaction et une voie secondaire longue - Google Patents

Système de contrôle actif de bruit avec rétroaction et une voie secondaire longue Download PDF

Info

Publication number
EP2629289B1
EP2629289B1 EP12155561.9A EP12155561A EP2629289B1 EP 2629289 B1 EP2629289 B1 EP 2629289B1 EP 12155561 A EP12155561 A EP 12155561A EP 2629289 B1 EP2629289 B1 EP 2629289B1
Authority
EP
European Patent Office
Prior art keywords
microphone
anc
loudspeaker
signal
filter
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
EP12155561.9A
Other languages
German (de)
English (en)
Other versions
EP2629289A1 (fr
Inventor
Markus Christoph
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.)
Harman Becker Automotive Systems GmbH
Original Assignee
Harman Becker Automotive Systems GmbH
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 Harman Becker Automotive Systems GmbH filed Critical Harman Becker Automotive Systems GmbH
Priority to EP12155561.9A priority Critical patent/EP2629289B1/fr
Publication of EP2629289A1 publication Critical patent/EP2629289A1/fr
Application granted granted Critical
Publication of EP2629289B1 publication Critical patent/EP2629289B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • G10K11/1781—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
    • G10K11/1785—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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17857—Geometric disposition, e.g. placement of microphones
    • 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
    • G10K2210/10—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
    • G10K2210/128—Vehicles
    • G10K2210/1282—Automobiles
    • 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
    • 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

Definitions

  • the invention relates to a feedback ANC system having a long secondary path and, in particular, to a feedback ANC system applicable in vehicle cabins.
  • Active noise control (ANC) systems are, for example, known from the publications JP S60-183900 A , US 2008/240456 A1 , US 2005/207585 A1 , US 5,953,428 , JP H11-305784 A , and US 2010/124337 A1 .
  • the publication US 2009/220098 A1 describes an adaptive bass management method for adapting sound pressure levels in at least one listening location.
  • JPH0632532B discloses a feedback ANC system for a vehicle in which a useful signal (such as a radio or cassette player sound) is added to the ANC signal output by the ANC loudspeaker, and in which a delayed and adjusted version of the useful signal is subtracted from the error signal prior to feeding it to the ANC flter.
  • a useful signal such as a radio or cassette player sound
  • a microphone is acoustically coupled to a loudspeaker via a secondary path and the loudspeaker is electrically coupled to the microphone via an electrical ANC filter.
  • the ANC filter filters the signal from the microphone such that the signal that it provides to the loudspeaker and that is radiated by the loudspeaker to the microphone via the secondary path cancels the noise signal in the vicinity of the microphone.
  • the degree of noise cancellation depends on the quality and stabilitiy of the secondary path and the ANC filter.
  • Feedback ANC systems are commonly used in arrangements in which the microphone is arranged relatively close ( ⁇ 0.34 m) to the loudspeaker as, for instance, in ANC headphones and, thus, in connection with very short secondary paths.
  • feedback ANC systems are often implemented in analog circuitry and/or as non-adaptive fixed filters so that subsequent adaption to different modes of operation is difficult or even impossible.
  • vehicle cabins are relatively large rooms with long distances ( ⁇ 0.34 m) between loudspeaker and microphone.
  • different modes of operation with widely varying secondary paths are determined by different passengers, a different number of passengers, open doors and open windows etc.
  • Feedback ANC systems are not considered suitable for applications in large rooms and are therefore not suitable for automotive applications.
  • Common automotive ANC systems are feedforward systems, such as the so-called engine order compensation (EOC) system or the road noise compensation (RNC) system, that use dedicated non-acoustic sensors and operate in a very limited frequency range.
  • EOC engine order compensation
  • RNC road noise compensation
  • feedback ANC systems in general are less complex, require less circuitry, operate in a broader frequency range and exhibit a better performance.
  • a feedback ANC system comprises a microphone and a loudspeaker arranged in a distance from each other.
  • the microphone is acoustically coupled to the loudspeaker via a secondary path and the loudspeaker is electrically coupled to the microphone via an ANC filter.
  • the distance between the microphone and the loudspeaker is larger than a value that is determined by the speed of sound divided by 20 times an upper critical frequency of the ANC system, and smaller than or equal to a value that is determined by the speed of sound divided by two times an upper critical frequency.
  • the system further comprises a first subtractor that is connected downstream of the microphone and a first useful-signal path, wherein the ANC filter is connected downstream of the first subtractor.
  • the system also comprises a second subtractor that is connected upstream of the loudspeaker, and connected downstream of the ANC filter and a second useful-signal path. Both useful-signal paths are supplied with a useful signal to be reproduced.
  • the second useful-signal path comprises a second spectrum shaping filter that has a transfer characteristic that is equal to the inverse secondary path transfer characteristic.
  • FIG. 1 is a block diagram illustrating the principles of signal processing in a feedback ANC system.
  • an error microphone 1 is acoustically coupled to a loudspeaker 2 via a secondary path 3 and the loudspeaker 2 is electrically coupled to the microphone 1 via a feedback signal path 4 including a microphone pre-amplifier 5, a subsequent ANC filter 6 with a transfer function W(z) and a subsequent loudspeaker driver amplifier 7 whose amplification A 7 is adjustable or controllable.
  • the microphone 1 and the loudspeaker 2 are arranged in a room, e.g., a vehicle cabin 10.
  • the term “loudspeaker” as used herein means any type of transducer that converts electrical signals it receives into acoustic signals that it radiates. Accordingly, the term “microphone” as used herein means any type of transducer that converts acoustic signals it receives into electrical signals that it provides.
  • the microphone 1 receives an acoustic signal that is composed of an acoustic output signal y(t) and an acoustic disturbance signal d(t).
  • Output signal y(t) is the output signal of the loudspeaker 2 filtered with a transfer function S(z) of the secondary path 3 and disturbance signal d(t) is the output signal of a noise source 8 filtered with a transfer function P(z) of a primary path 9.
  • FIG. 2 shows a vehicle cabin 10 in which the active noise reduction system of FIG. 1 may be applied.
  • the microphone 1 is mounted in the left front portion 11 of the cabin 10, close to a driver's head.
  • the loudspeaker 2 e.g., a subwoofer, is mounted on the rear shelf 12 of the cabin 10. The distance d between the microphone 1 and the loudspeaker 2 is approximately 3 m.
  • FIG. 3 depicts (a) the magnitude frequency response, (b) the phase frequency response, (c) the sensitivity function and (d) the complementary sensitivity function.
  • the magnitude frequency response is the magnitude in dB over frequency in Hz.
  • the phase frequency response is the phase in degree over frequency in Hz.
  • H OL (z) W(z) ⁇ S(z) is the transfer function of the open loop of the feedback ANC system.
  • an analog, non-adaptive ANC filter may be used that comprises one boost and one cut equalizing filter with the following dimensioning:
  • FIGS 3c and 3d illustrate the corresponding sensitivity function 17 and the complementary sensitivity function 19, each in connection with the error margin18.
  • graphs 20 and 21 depict measurements of the attenuation A [dB] over frequency f [Hz] of the system shown in FIGS. 1 and 2 when the ANC system is not active (20) and when it is active (21). It can readily be seen from graph 25 that a maximum attenuation of approximately 8 dB is reached in exact the spectral range identified in the simulations and that the ANC filter used exhibits the so-called "Waterbed Effect" which describes an increase in attenuation in a certain spectral range typical for ANC systems but which may be considered too large in the present case and, thus, may render the system instable under certain conditions.
  • Waterbed Effect describes an increase in attenuation in a certain spectral range typical for ANC systems but which may be considered too large in the present case and, thus, may render the system instable under certain conditions.
  • the loop gain LP may be decreased by, e.g., up to 3 dB.
  • graph 22 which represents a system with low-pass filtering and inactive ANC
  • graph 23 which represents a system with low-pass filtering and active ANC
  • the difference of graphs 22 and 23 being about 6 dB and represented by graph 24.
  • graphs 20 and 21 show that there is no attenuation by the ANC system at higher frequencies.
  • the system disclosed herein allows for distances between the microphone and the loudspeaker larger than a value that is determined by the speed of sound divided by 20 times an upper critical frequency.
  • a satisfactory performance may be even achieved, e.g., for distances between the microphone and the loudspeaker that are smaller than or equal to a value that is determined by the speed of sound divided by 2 times an upper critical frequency.
  • FIG. 5 shows a multi-zone ANC system with four zones of silent FL, FR, RL and RR that correspond to driver/passenger positions front left, front right, rear left and rear right.
  • one of microphones 1 fl , 1 fr , 1 rl , 1 rr and one of loudspeakers 2 fl , 2 fr , 2 rl , 2 rr are arranged in a distance d fl , d fr , d rl , d rr > 0.3 m from each other.
  • Each one of microphones 1 fl , 1 fr , 1 rl ,1 rr is connected to a corresponding one of loudspeakers 2 fl , 2 fr , 2 rl , 2 rr via one of ANC filters 6fl, 6fr, 6rl, 6rr which are operated independently of each other.
  • the feedback ANC systems described herein are capable of distinguishing between wanted signals, i.e., useful signals such as acoustic warning signals, music and speech, and unwanted signals such as noise.
  • useful signals such as acoustic warning signals, music and speech
  • unwanted signals such as noise.
  • Exemplary circuit structures with specific input paths for the useful signals are described below with reference to FIGS. 6 , 7 and 8 .
  • FIG. 6 is a block diagram illustrating a general feedback type active noise reduction system in which the useful signal is supplied to both the loudspeaker path and the microphone path.
  • the primary path 9 is omitted below, notwithstanding that noise (disturbing signal d[n]) is still present.
  • the system of FIG. 6 is based on the system of FIG. 1 , however with an additional subtractor 26 that subtracts the useful signal x[n] from the microphone output signal y[n] to form the ANC filter input signal, i.e., error signal e[n] and with a subtractor 27 that subtracts the useful signal x[n] from the output signal u[n] of ANC filter 6.
  • M z S z ⁇ W z ⁇ S z / 1 ⁇ W z ⁇ S z lim W z ⁇ S z ⁇ 1 M z ⁇ M z ⁇ ⁇ lim W z ⁇ S z ⁇ 0 M z ⁇ M z ⁇ S z lim W z ⁇ S z ⁇ ⁇ ⁇ M z ⁇ M z ⁇ 1 .
  • the useful signal transfer characteristic M(z) approaches S(z) when the open loop transfer characteristic (W(z) ⁇ S(z)) approaches 0.
  • the system of FIG. 6 depends on the transfer characteristic S(z) of the secondary path 3 and its fluctuations due to aging, temperature, change of listener etc.
  • FIG. 7 a system is shown that is based on the system of FIG. 6 and that additionally includes an equalizing filter 28 connected upstream of the subtractor 27 in order to filter the useful signal x[n] with the inverse secondary path transfer function 1/S(z).
  • the microphone output signal y[n] is identical to the useful signal x[n], which means that signal x[n] is not altered by the system if the characteristic of the equalizing filter is exactly the inverse of the secondary path transfer characteristic S(z).
  • the secondary path transfer function S(z) in a car is generally not minimum-phase, as can be seen, e.g., from the phase frequency response shown FIGS. 3a and 3b, only approximations of its inverse exist. The probably simplest way is to take the minimum-phase version of S(z), since this can be inverted.
  • y[z] x[z]
  • FIG. 8 a system is shown that is based on the system of FIG. 3 and that additionally includes an equalizing filter 28 connected upstream of the subtractor 26 in order to filter the useful signal x[n] with the secondary path transfer function S(z).
  • the useful signal transfer characteristic M(z) is identical with the secondary path transfer characteristic S(Z) when the ANC system is active.
  • the useful signal transfer characteristic M(z) is also identical with the secondary path transfer characteristic S(Z).
  • the aural impression of the useful signal for a listener at a location close to the microphone 1 is the same regardless of whether noise reduction is active or not. This is the most likely way of considering a useful-signal in terms of an automobile environment, since there the useful-signal is mostly music, which should not be disturbed by an algorithm like the feedback ANC system specified here.
  • the thereby needed replica of the secondary path S(z) can, without any problems, be realized in a complex form e.g.
  • the ANC filter 6 and the equalizing filters 28 and 29 may be fixed filters with constant transfer characteristics or adaptive filters with controllable transfer characteristics.
  • the adaptive structure of a filter per se is indicated by an arrow underlying the respective block and the optionality of the adaptive structure is indicated by a broken line.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Claims (10)

  1. Système ANC avec rétroaction comprenant un microphone (1) et un haut-parleur (2) disposés à distance l'un de l'autre ; dans lequel
    le microphone (1) est couplé acoustiquement au haut-parleur (2) via une voie secondaire (3) ; le haut-parleur (2) étant couplé électriquement au microphone (1) via un filtre ANC (6) ; et
    la distance (d) entre le microphone (1) et le haut-parleur (2) est supérieure à une valeur qui est déterminée par la vitesse du son divisée par vingt fois une fréquence critique supérieure (fUL) du système ANC,
    dans lequel la distance (d) entre le microphone (1) et le haut-parleur (2) est inférieure ou égale à une valeur qui est déterminée par la vitesse du son divisée par deux fois une fréquence critique supérieure (fUL),
    dans lequel le système comprend en outre :
    un premier soustracteur (26) qui est connecté en aval du microphone (1) et une première voie de signal utile, dans lequel le filtre ANC (6) est connecté en aval du premier soustracteur (26) ; et
    un second soustracteur (27) qui est connecté en amont du haut-parleur (2) et connecté en aval du filtre ANC (6) et une seconde voie de signal utile ; dans lequel les deux voies de signal utile reçoivent un signal utile (x[n]) à reproduire,
    caractérisé en ce que
    la seconde voie de signal utile comprend un second filtre de mise en forme de spectre (28) qui a une caractéristique de transfert (1/S(z)) qui est égale à la caractéristique de transfert de voie secondaire inverse.
  2. Système selon la revendication 1, dans lequel la distance (d) entre le haut-parleur (2) et le microphone (1) est supérieure à 0,34 mètre.
  3. Système selon l'une des revendications 1 et 2, dans lequel le filtre ANC (6) est un filtre analogique.
  4. Système selon l'une des revendications 1 à 3, dans lequel le filtre ANC (6) est un filtre non adaptatif.
  5. Système selon l'une des revendications 1 à 4, comprenant en outre n ≥ 1 microphones supplémentaires (1fl, 1fr, 1rl, 1rr) et n haut-parleurs (2fl, 2fr, 2rl, 2rr), chacun des haut-parleurs (2fl, 2fr, 2rl, 2rr) étant disposé à une distance (dfl, dfr, drl, drr) supérieure à une valeur qui est déterminée par la vitesse du son divisée par vingt fois une fréquence critique supérieure (fUL).
  6. Système selon la revendication 5, dans lequel la distance (dfl, dfr, drl, drr) entre chaque microphone (1fl, 1fr, 1rl, 1rr) et chaque haut-parleur (2fl, 2fr, 2rl, 2rr) est inférieure ou égale à une valeur qui est déterminée par la vitesse du son divisée par deux fois une fréquence critique supérieure (fUL).
  7. Système selon la revendication 4 ou 5, comprenant en outre n filtres ANC supplémentaires (6fl, 6fr, 6rl, 6rr) ; chaque filtre ANC supplémentaire (6fl, 6fr, 6rl, 6rr) étant connecté entre l'un des microphones supplémentaires (1fl, 1fr, 1rl, 1rr) et l'un des haut-parleurs supplémentaires (2fl, 2fr, 2rl, 2rr).
  8. Système selon l'une des revendications 1 à 7, dans lequel au moins l'une des voies de signal utile comprend au moins un filtre de mise en forme de spectre (28, 29).
  9. Système selon la revendication 8, dans lequel la voie secondaire (3) a une caractéristique de transfert de voie secondaire (S(z)) et au moins l'un des filtres de mise en forme de spectre (28, 29) a une caractéristique de transfert qui modélise la caractéristique de transfert de voie secondaire (S(z)) ou linéarise un signal de microphone émis par le microphone (2) par rapport au signal utile (x[n]).
  10. Système selon l'une des revendications 1 à 9, dans lequel la première voie de signal utile comprend un premier filtre de mise en forme de spectre (29) qui a une caractéristique de transfert (S(z)) qui est égale à la caractéristique de transfert de voie secondaire.
EP12155561.9A 2012-02-15 2012-02-15 Système de contrôle actif de bruit avec rétroaction et une voie secondaire longue Active EP2629289B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12155561.9A EP2629289B1 (fr) 2012-02-15 2012-02-15 Système de contrôle actif de bruit avec rétroaction et une voie secondaire longue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12155561.9A EP2629289B1 (fr) 2012-02-15 2012-02-15 Système de contrôle actif de bruit avec rétroaction et une voie secondaire longue

Publications (2)

Publication Number Publication Date
EP2629289A1 EP2629289A1 (fr) 2013-08-21
EP2629289B1 true EP2629289B1 (fr) 2022-06-15

Family

ID=45655822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12155561.9A Active EP2629289B1 (fr) 2012-02-15 2012-02-15 Système de contrôle actif de bruit avec rétroaction et une voie secondaire longue

Country Status (1)

Country Link
EP (1) EP2629289B1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104616667B (zh) * 2014-12-02 2017-10-03 清华大学 一种用于汽车内的主动降噪方法
EP3338279A1 (fr) * 2015-08-20 2018-06-27 Cirrus Logic International Semiconductor Ltd. Contrôleur d'élimination de bruit adaptatif de rétroaction (anc) et procédé ayant une réponse de rétroaction partiellement fournie par un filtre à réponse fixe
EP3185241B1 (fr) * 2015-12-23 2020-02-05 Harman Becker Automotive Systems GmbH Système de haut-parleur couplé de façon externe
CN106143369B (zh) * 2016-07-05 2018-07-03 同济大学 一种增程式电动汽车用噪声主动控制装置
TWI609363B (zh) * 2016-11-23 2017-12-21 驊訊電子企業股份有限公司 主動降噪校正系統與揚聲裝置
DE102017126883B4 (de) * 2017-11-15 2022-07-28 Linde Material Handling Gmbh Arbeitsfahrzeug mit Lärmreduzierung in einer Fahrerkabine
US10339912B1 (en) * 2018-03-08 2019-07-02 Harman International Industries, Incorporated Active noise cancellation system utilizing a diagonalization filter matrix
CN108538304B (zh) * 2018-03-09 2021-10-01 华侨大学 车内噪声主动控制***
CN108615523B (zh) * 2018-05-08 2022-10-04 南京信息工程大学 调节反馈有源控制***水床效应的频域自适应方法
CN114582312B (zh) * 2022-02-14 2022-11-22 中国科学院声学研究所 一种车内抗干扰自适应路噪主动控制方法及控制***

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0632532B2 (ja) * 1984-11-07 1994-04-27 日産自動車株式会社 車両の車室騒音低減装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60183900A (ja) * 1984-03-02 1985-09-19 Mazda Motor Corp 車室内音改質装置
US5953428A (en) * 1996-04-30 1999-09-14 Lucent Technologies Inc. Feedback method of noise control having multiple inputs and outputs
JPH11305784A (ja) * 1998-04-24 1999-11-05 Matsushita Electric Ind Co Ltd 騒音制御装置
ATE402468T1 (de) * 2004-03-17 2008-08-15 Harman Becker Automotive Sys Geräuschabstimmungsvorrichtung, verwendung derselben und geräuschabstimmungsverfahren
JP2008247221A (ja) * 2007-03-30 2008-10-16 Honda Motor Co Ltd 能動型騒音制御装置
ATE518381T1 (de) * 2007-09-27 2011-08-15 Harman Becker Automotive Sys Automatische bassregelung
US9020158B2 (en) * 2008-11-20 2015-04-28 Harman International Industries, Incorporated Quiet zone control system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0632532B2 (ja) * 1984-11-07 1994-04-27 日産自動車株式会社 車両の車室騒音低減装置

Also Published As

Publication number Publication date
EP2629289A1 (fr) 2013-08-21

Similar Documents

Publication Publication Date Title
EP2629289B1 (fr) Système de contrôle actif de bruit avec rétroaction et une voie secondaire longue
KR101969417B1 (ko) 개선된 강건성을 갖는 적응형 소음 제어 시스템
US5481615A (en) Audio reproduction system
EP2551845B1 (fr) Reproduction de sons réduisant le bruit
US7020288B1 (en) Noise reduction apparatus
EP3185241B1 (fr) Système de haut-parleur couplé de façon externe
EP2551846B1 (fr) Reproduction de sons réduisant le bruit
EP1850631A2 (fr) Compensation de haute fréquence
EP2996111A1 (fr) Système evolutif de contrôle adaptatif de bruit
CN111727472B (zh) 具有反馈补偿的有源噪声控制
US11250832B2 (en) Feedforward active noise control
EP2257082A1 (fr) Estimation du bruit de fond dans un système de microphone/haut-parleur de pièce
Freudenberger et al. Noise and feedback suppression for in-car communication systems
JP4805034B2 (ja) スピーカシステム
CN113519169A (zh) 用于音频啸叫衰减的方法和装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20140220

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20190129

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20220105

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602012078355

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1498860

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220715

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20220615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220915

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220916

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220915

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1498860

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221017

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221015

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602012078355

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

26N No opposition filed

Effective date: 20230316

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230526

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602012078355

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20230228

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20230215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230215

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220615

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230215

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230215

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228