EP3178084B1 - Réduction active de bruit harmonique en provenance de multiples sources de bruit - Google Patents

Réduction active de bruit harmonique en provenance de multiples sources de bruit Download PDF

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Publication number
EP3178084B1
EP3178084B1 EP15763674.7A EP15763674A EP3178084B1 EP 3178084 B1 EP3178084 B1 EP 3178084B1 EP 15763674 A EP15763674 A EP 15763674A EP 3178084 B1 EP3178084 B1 EP 3178084B1
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EP
European Patent Office
Prior art keywords
noise
harmonic
frequency
frequencies
sine wave
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EP15763674.7A
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German (de)
English (en)
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EP3178084A1 (fr
Inventor
Alaganandan Ganeshkumar
Dennis D. KLUG
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Bose Corp
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Bose Corp
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Priority claimed from US14/494,852 external-priority patent/US9344796B2/en
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Publication of EP3178084A1 publication Critical patent/EP3178084A1/fr
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    • 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
    • G10K11/1781—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
    • G10K11/17823—Reference signals, e.g. ambient acoustic environment
    • 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
    • G10K11/17835—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 using detection of abnormal input 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
    • G10K11/1787—General system configurations
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
    • 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
    • G10K2210/3026—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
    • G10K2210/3027—Feedforward
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • 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
    • G10K2210/3028—Filtering, e.g. Kalman filters or special analogue or digital filters
    • 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
    • G10K2210/3033—Information contained in memory, e.g. stored signals or transfer 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
    • 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
    • G10K2210/3054—Stepsize variation

Definitions

  • This disclosure relates to the active reduction of harmonic noise from two or more noise sources.
  • Engine harmonic cancellation systems are adaptive feed-forward noise reduction systems that are used in motor vehicles, for example in cabins or in muffler assemblies, to reduce or cancel engine harmonic noise.
  • a sine wave at the frequency to be cancelled is used as an input to an adaptive filter.
  • Engine harmonic cancellation systems also use one or more microphones as error input transducers.
  • the adaptive filter can alter the magnitude and/or the phase of the input sine wave.
  • the output of the adaptive filter is applied to one or more transducers that produce sound (i.e., loudspeakers) that is acoustically opposite to the undesirable engine harmonics that are to be canceled.
  • the aim of the system is to cancel the noise at the frequency or frequencies of interest by adaptively minimizing the total energy across all error microphone input signals. In order to do so, the loudspeaker outputs have a negative gain.
  • the system and method of this disclosure are effective to reduce the audible artifacts that can be created by an adaptive feed-forward noise reduction system when two or more frequencies being cancelled are too close to each other.
  • the frequencies being cancelled can include a fixed frequency, engine harmonic and propshaft harmonic that are targeting nearby frequencies.
  • the frequencies being cancelled include multiple engine harmonics (e.g., at low engine speeds where the harmonics are closer in frequency).
  • the system and method may be configured for cancelling frequencies from four or more sources and the frequencies can include, inter alia, fixed frequency, engine harmonic, propshaft harmonic, tire harmonic, vehicle electric motor.
  • the reduction of audible artifacts can be accomplished by determining the proximity of the frequencies being cancelled and based on the proximity altering the operation of one or more of the adaptive filters.
  • the steps may be performed by one element or a plurality of elements. The steps may be performed together or at different times.
  • the elements that perform the activities may be physically the same or proximate one another, or may be physically separate.
  • One element may perform the actions of more than one block.
  • Audio signals may be encoded or not, and may be transmitted in either digital or analog form. Conventional audio signal processing equipment and operations are in some cases omitted from the drawing.
  • Overlap detector 42 takes in as control signals from frequency computers 24 and 31 the harmonic frequencies that are going to be cancelled, and makes a decision of when the frequencies are close enough to affect the stability margin. If so, it causes the adaptive filters to automatically change the value of one or more variables of the adaptive algorithm.
  • the variables that are changed can be one or both of the adaptation step size and the leakage parameter.
  • Adaptation step size and leakage in an adaptive algorithm are disclosed in US Patents 8,194,873 , 8,204,242 , 8,355,512 , and 8,306,240 .
  • the detector can have multiple degrees of overlap, and for each it can have ability to select from predetermined values of the appropriate adaptive algorithm parameters.
  • Curve 106 (in dashed line) illustrates an excursion in the sound when the engine and prop shaft noise cancellation systems are both on and there is a change in cabin transfer function that results in the creation of noise artifacts that increase the sound levels quite dramatically around the frequency corresponding to around 3000 RPM.
  • the system disclosed herein would be enabled to alter the values of one or more parameters of the adaptive filter algorithm to bring the operation back closer to curve 104, where it would be if only one canceller was being used.
  • noise cancellation in a vehicle cabin was described relative to noise cancellation in a vehicle cabin.
  • the disclosure applies as well to noise cancellation in other vehicle locations.
  • the system can be designed to cancel noise in a muffler assembly.
  • noise may be engine harmonic noise but may also be other engine-operation related noise and/or noise caused by another noise source, such as another rotating device, in the vehicle.
  • canceller 44 again has harmonic frequency computer 24 that is input with the engine RPM; however, in this case, canceller 146 does not include, and has no need for, a harmonic frequency computer since the noise that it is cancelling pertains to a fixed frequency that is known a priori.
  • Each canceller has a harmonic sine wave generator (25 and 132, respectively) that generates sine waves at the frequencies to be cancelled.
  • sine wave generator 132 generates a sine wave at the fixed frequency of interest based on the information received from computer memory.
  • Sine wave generator 25 is input with the computed harmonic frequency from harmonic frequency computer 24, and sine wave generator is input with the fixed frequency to be cancelled, which may be retrieved from computer memory.
  • the fixed frequency may be a value stored in computer memory during system tuning.

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  • 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)
  • Filters That Use Time-Delay Elements (AREA)

Claims (13)

  1. Système (10) de réduction de bruit harmonique provoqué par une pluralité de sources de bruit en amenant un ou plusieurs haut-parleurs à produire des sons qui sont à peu près aux mêmes fréquences que le bruit et de phase sensiblement opposée, le système (10) comprenant :
    une pluralité de dispositifs de suppression de bruit (44, 46), chaque dispositif de suppression de bruit (44, 46) comprenant un générateur d'onde sinusoïdale harmonique (25, 32) qui est agencé pour générer une onde sinusoïdale de sortie ayant une fréquence qui correspond au bruit à réduire, et un filtre adaptatif (20, 36) qui est agencé pour utiliser une onde sinusoïdale pour créer un signal de réduction de bruit qui est utilisé pour piloter un ou plusieurs transducteurs (14) avec leurs sorties dirigées pour réduire un bruit provoqué par les sources de bruit ; et
    un détecteur de chevauchement (42) qui est agencé pour comparer les fréquences du bruit provoqué par la pluralité de sources de bruit et, sur la base de la proximité des fréquences, modifier le fonctionnement d'un ou plusieurs des filtres adaptatifs (20, 36), dans lequel
    le détecteur de chevauchement (42) est agencé pour modifier un fonctionnement d'un ou plusieurs des filtres adaptatifs (20, 36) en changeant les valeurs d'un ou plusieurs paramètres variables d'un filtre adaptatif (20, 36), caractérisé en ce que les paramètres variables comprennent les dimensions d'échelon d'adaptation des filtres adaptatifs (20, 36), et les dimensions d'échelon sont diminuées quand les proximités des fréquences sont proches.
  2. Système (10) selon la revendication 1, dans lequel la dimension d'échelon d'adaptation est diminuée d'environ la moitié quand deux fréquences de signal d'entrée sont approximativement coïncidentes.
  3. Système (10) selon la revendication 1, comprenant en outre une mémoire informatique qui est agencée pour stocker des relations entre la proximité de des fréquences et les changements résultants dans les valeurs des paramètres de filtre adaptatif.
  4. Système (10) selon la revendication 1, dans lequel les un ou plusieurs paramètres variables comprennent un paramètre de fuite.
  5. Système (10) selon la revendication 1, dans lequel les sorties de transducteur (14) sont dirigées dans l'habitacle (12) d'un véhicule motorisé.
  6. Système (10) selon la revendication 1, dans lequel au moins une des sources de bruit comprend un dispositif rotatif.
  7. Système (10) selon la revendication 6, dans lequel les sources de bruit comprennent un moteur de véhicule et un arbre porte-hélice de véhicule.
  8. Système (10) selon la revendication 1, dans lequel au moins un des dispositifs de suppression de bruit (44, 46) est configuré pour créer un signal de réduction de bruit qui est utilisé pour piloter un ou plusieurs transducteurs (14) avec leurs sorties dirigées pour réduire un bruit à une fréquence fixe.
  9. Système (10) selon la revendication 8, dans lequel l'au moins un des générateurs d'onde sinusoïdale harmonique (25, 32) est configuré pour générer une onde sinusoïdale de sortie sur la base d'une valeur de fréquence reçue à partir d'une mémoire informatique.
  10. Système (10) selon la revendication 1, dans lequel au moins un des dispositifs de suppression de bruit (44, 46) comprend un calculateur de fréquence harmonique (24, 31) qui est agencé pour calculer, à partir d'un signal d'entrée, une fréquence harmonique et fournir la fréquence harmonique à l'un correspondant des générateurs d'onde sinusoïdale harmonique (25, 32).
  11. Système (10) selon la revendication 1, dans lequel au moins un des dispositifs de suppression de bruit (44, 46) est configuré pour créer un signal de réduction de bruit qui est utilisé pour piloter un ou plusieurs transducteurs (14) avec leurs sorties dirigées pour réduire un bruit provoqué par un dispositif rotatif.
  12. Système (10) selon la revendication 11, dans lequel au moins une des sources de bruit ne comprend pas un dispositif rotatif.
  13. Système (10) selon la revendication 1, dans lequel au moins une des sources de bruit ne comprend pas un dispositif rotatif.
EP15763674.7A 2014-09-24 2015-08-19 Réduction active de bruit harmonique en provenance de multiples sources de bruit Active EP3178084B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/494,852 US9344796B2 (en) 2013-03-25 2014-09-24 Active reduction of harmonic noise from multiple noise sources
PCT/US2015/045823 WO2016048489A1 (fr) 2014-09-24 2015-08-19 Réduction active de bruit harmonique en provenance de multiples sources de bruit

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EP3178084A1 EP3178084A1 (fr) 2017-06-14
EP3178084B1 true EP3178084B1 (fr) 2018-10-03

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EP (1) EP3178084B1 (fr)
JP (1) JP6499279B2 (fr)
CN (1) CN106716522B (fr)
WO (1) WO2016048489A1 (fr)

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CN109413549B (zh) * 2017-08-18 2020-03-31 比亚迪股份有限公司 车辆内部的噪声消除方法、装置、设备及存储介质
CN110021288B (zh) * 2018-01-10 2021-07-30 郑州宇通客车股份有限公司 车辆主动降噪控制方法及其系统
CN109166567A (zh) * 2018-10-09 2019-01-08 安徽信息工程学院 一种降噪方法及设备
CN110010146B (zh) * 2019-04-10 2021-08-03 无锡吉兴汽车声学部件科技有限公司 一种汽车主动降噪系统及方法
CN113808564B (zh) * 2020-06-12 2024-03-19 青岛海尔电冰箱有限公司 厨房降噪方法、冰箱及计算机可读存储介质
CN112433371A (zh) * 2020-10-22 2021-03-02 歌尔光学科技有限公司 头戴设备

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WO2016048489A1 (fr) 2016-03-31
JP6499279B2 (ja) 2019-04-10
EP3178084A1 (fr) 2017-06-14
JP2017537335A (ja) 2017-12-14
CN106716522A (zh) 2017-05-24
CN106716522B (zh) 2021-02-05

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