EP0539939A1 - Aktives Lärmunterdrückungssystem - Google Patents

Aktives Lärmunterdrückungssystem Download PDF

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Publication number
EP0539939A1
EP0539939A1 EP92118415A EP92118415A EP0539939A1 EP 0539939 A1 EP0539939 A1 EP 0539939A1 EP 92118415 A EP92118415 A EP 92118415A EP 92118415 A EP92118415 A EP 92118415A EP 0539939 A1 EP0539939 A1 EP 0539939A1
Authority
EP
European Patent Office
Prior art keywords
noise
cancellation
generating
sensors
target area
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.)
Granted
Application number
EP92118415A
Other languages
English (en)
French (fr)
Other versions
EP0539939B1 (de
Inventor
Juha Kuusama
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.)
Nokia Technology GmbH
Original Assignee
Nokia Technology 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 Nokia Technology GmbH filed Critical Nokia Technology GmbH
Publication of EP0539939A1 publication Critical patent/EP0539939A1/de
Application granted granted Critical
Publication of EP0539939B1 publication Critical patent/EP0539939B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G10K11/1785—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
    • G10K11/17879—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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/103—Three dimensional
    • 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
    • G10K2210/3046—Multiple acoustic inputs, multiple acoustic outputs
    • 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
    • G10K2210/321—Physical
    • G10K2210/3217—Collocated sensor and cancelling actuator, e.g. "virtual earth" designs
    • 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
    • G10K2210/321—Physical
    • G10K2210/3225—Radio or other sources used in ANC for transfer function estimation; Means to avoid interference between desired signals, e.g. from a car stereo, and the ANC signal

Definitions

  • the present invention relates to an active noise cancellation system for a vehicle having a sound reproduction system, comprising means for generating one or more electrical signal(s) proportional to the noise in the target area, an electronic means receiving these signals, such as an adaptive filter, for generating a noise cancellation signal, one or more sound sources connected to said electronic means for generating cancellation noise in the target area, and one or more sensors for detecting residual noise in the target area and transmitting it in an electrical form to the electronic means to tune its operation.
  • Figures 1 and 2 in the accompanying drawing illustrate the conventional system for realizing active noise cancellation in a vehicle, such as a car.
  • Figure 1 shows the apparatus components required in such an active noise cancellation system
  • Figure 2 shows the placing of the most essential of these in the vehicle.
  • a conventional active noise cancellation system of the kind shown in Figure 1 comprises first of all detection sensors 1, the purpose of which is to generate a signal proportional to the noise present in the target area.
  • these detection sensors can be for instance microphones.
  • the signals from these detection sensors are inputted in an electronic means 2, such as an adaptive filter, which in response to said signals being proportional to the noise in the target area generates a noise cancellation signal, which is ideally of equal amplitude but opposite phase to the noise signal, in which case the noise cancellation signal as reproduced through the sound sources 3 will cancel the noise in the target area.
  • the cancellation can be directed specifically to periodic components of noise.
  • the noise can be attenuated about 10-30 dB at the motor noise frequency.
  • the system further includes sensors 4 for residual noise, which may in practice be for instance microphones adapted to listen in the target area.
  • the means 2 for generating cancellation noise can adapt its function to afford optimum attenuation.
  • Figure 2 shows the placing of the components of the system of Figure 1 in a car.
  • the actual means 2 for generating the cancellation noise is then fitted within the door panel of the vehicle, and the loudspeakers 3 generating the cancellation noise are placed in the corners of the interior of the vehicle body.
  • the system further comprises several sensors 4 monitoring residual noise, being disposed in the upper part of the interior of the body.
  • the placing of the sensors for cancellation noise in the interior of the vehicle body constitutes a problem.
  • the placing of these sensors in such a way that they do not interfere with the other furnishings of the interior of the vehicle is very problematic, since these sensors and particularly the wiring to be brought thereto must be fitted within the upholstery of the interior, which requires rather extensive additional mounting work.
  • the object of the present invention is to provide an active noise cancellation system for a vehicle, wherein the placing of the sound sources for cancellation noise and particularly that of the sensors for residual noise does not present problems of the kind described above, but these requisite components of the active noise cancellation system can be fitted within the vehicle without any additional work being involved.
  • the noise cancellation system of the invention the first embodiment of which is characterized in that the sound sources for the generation of cancellation noise are constituted by the loudspeakers of the sound reproduction system of the vehicle, and that the sensor or at least one of the sensors for detecting residual noise is fitted in conjunction with one of said loudspeakers.
  • the noise cancellation system is again characterized in that the sound sources for generating cancellation noise are constituted by the loudspeakers of the sound reproduction system of the vehicle, and that the sensor or at least one of the sensors for detecting residual noise has been fitted in conjunction with said electronic means.
  • a sound reproduction system is installed in a normal vehicle, particularly a car, said sound reproduction system typically comprising a central unit and four loudspeakers placed approximately in the corners of the interior of the car.
  • the loudspeakers 3 of the sound reproduction system are used as sound sources generating the cancellation noise of the noise cancellation system, and the sensors 4 of residual noise are placed in the immediate vicinity of these loudspeakers for instance in the same cabinet with them.
  • the wiring of the sensors can then be drawn by the same routes as the wiring of the loudspeakers, or a single multicore cable can simply be used for both the loudspeaker and the sensor of residual noise pertaining thereto.
  • a single multicore cable can simply be used for both the loudspeaker and the sensor of residual noise pertaining thereto.
  • the fitting of these sensors does not cause any additional work as compared with the mounting of the loudspeakers of a normal sound reproduction system.
  • the means 2 for generating the cancellation noise does not directly reproduce this residual noise signal but only monitors some of its frequency components and is controlled in response thereto to generate cancellation noise which most effectively cancels noise at the frequency of noises generated for instance by the motor and tires of the vehicle.
  • each loudspeaker -- four loudspeakers being normally provided -- of the sound reproduction system By placing one sensor for residual noise in conjunction with each loudspeaker -- four loudspeakers being normally provided -- of the sound reproduction system, one can achieve a system which is fully sufficient for the detection of this residual noise signal. Further, one sensor can be placed in conjunction with the means for generating cancellation noise, which also does not require additional work from the point of view of wiring or mounting.

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)
  • Filters That Use Time-Delay Elements (AREA)
  • Exhaust Silencers (AREA)
EP92118415A 1991-10-31 1992-10-28 Aktives Lärmunterdrückungssystem Expired - Lifetime EP0539939B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI915142A FI915142A (fi) 1991-10-31 1991-10-31 Aktivt bullerdaempningssystem
FI915142 1991-10-31

Publications (2)

Publication Number Publication Date
EP0539939A1 true EP0539939A1 (de) 1993-05-05
EP0539939B1 EP0539939B1 (de) 1997-04-23

Family

ID=8533402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92118415A Expired - Lifetime EP0539939B1 (de) 1991-10-31 1992-10-28 Aktives Lärmunterdrückungssystem

Country Status (4)

Country Link
EP (1) EP0539939B1 (de)
JP (1) JP2740091B2 (de)
DE (1) DE69219273T2 (de)
FI (1) FI915142A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996011466A1 (en) * 1994-10-06 1996-04-18 Duke University Feedback acoustic energy dissipating device with compensator
US5690321A (en) * 1992-09-29 1997-11-25 Mazda Motor Corporation Vibration damping system for vehicle
US6473509B2 (en) 2000-05-23 2002-10-29 Daimlerchrysler Ag Audio system, in particular for motor vehicles
CN101863243A (zh) * 2009-04-16 2010-10-20 通用汽车环球科技运作公司 车辆内部主动噪音消除
WO2014126725A1 (en) * 2013-02-15 2014-08-21 Bose Corporation Forward speaker noise cancellation in a vehicle
WO2018041956A1 (de) * 2016-09-01 2018-03-08 Knorr-Bremse Gesellschaft Mit Beschränkter Haftung Verfahren und vorrichtung zum verändern einer schallemission eines einstiegssystems für ein schienenfahrzeug, einstiegssystem und schienenfahrzeug
CN108346422A (zh) * 2017-01-25 2018-07-31 松下知识产权经营株式会社 有源噪音降低装置、车辆以及异常判定方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889058A (en) * 1969-01-15 1975-06-10 Ard Anstalt Telephone systems with reduced acoustic feedback
FR2531023A1 (fr) * 1982-08-02 1984-02-03 Peugeot Dispositif d'attenuation du bruit dans l'habitacle d'un vehicule automobile
WO1988004621A1 (en) * 1986-12-23 1988-06-30 Saab-Scania Aktiebolag Sealing arrangement for passing a wire bundle consisting of several wires through an opening in a vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0212947U (de) * 1988-07-08 1990-01-26
JP2781193B2 (ja) * 1989-02-25 1998-07-30 カルソニック株式会社 アクティブ・ノイズ・キャンセラー
JPH03203792A (ja) * 1989-12-29 1991-09-05 Nissan Motor Co Ltd 能動型騒音制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889058A (en) * 1969-01-15 1975-06-10 Ard Anstalt Telephone systems with reduced acoustic feedback
FR2531023A1 (fr) * 1982-08-02 1984-02-03 Peugeot Dispositif d'attenuation du bruit dans l'habitacle d'un vehicule automobile
WO1988004621A1 (en) * 1986-12-23 1988-06-30 Saab-Scania Aktiebolag Sealing arrangement for passing a wire bundle consisting of several wires through an opening in a vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RESEARCH DISCLOSURE, no. 317, September 1990, page 784, Emsworth, GB; ANONYMOUSLY: "An active noise controller" *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5690321A (en) * 1992-09-29 1997-11-25 Mazda Motor Corporation Vibration damping system for vehicle
WO1996011466A1 (en) * 1994-10-06 1996-04-18 Duke University Feedback acoustic energy dissipating device with compensator
US5848169A (en) * 1994-10-06 1998-12-08 Duke University Feedback acoustic energy dissipating device with compensator
US6473509B2 (en) 2000-05-23 2002-10-29 Daimlerchrysler Ag Audio system, in particular for motor vehicles
CN101863243A (zh) * 2009-04-16 2010-10-20 通用汽车环球科技运作公司 车辆内部主动噪音消除
CN101863243B (zh) * 2009-04-16 2013-02-06 通用汽车环球科技运作公司 车辆内部主动噪音消除
WO2014126725A1 (en) * 2013-02-15 2014-08-21 Bose Corporation Forward speaker noise cancellation in a vehicle
CN105074813A (zh) * 2013-02-15 2015-11-18 伯斯有限公司 车辆中的前方扬声器噪声消除
US9245519B2 (en) 2013-02-15 2016-01-26 Bose Corporation Forward speaker noise cancellation in a vehicle
CN105074813B (zh) * 2013-02-15 2019-06-21 伯斯有限公司 车辆中的前方扬声器噪声消除
WO2018041956A1 (de) * 2016-09-01 2018-03-08 Knorr-Bremse Gesellschaft Mit Beschränkter Haftung Verfahren und vorrichtung zum verändern einer schallemission eines einstiegssystems für ein schienenfahrzeug, einstiegssystem und schienenfahrzeug
CN108346422A (zh) * 2017-01-25 2018-07-31 松下知识产权经营株式会社 有源噪音降低装置、车辆以及异常判定方法

Also Published As

Publication number Publication date
DE69219273T2 (de) 1997-11-20
JPH07306683A (ja) 1995-11-21
FI915142A (fi) 1993-05-01
FI915142A0 (fi) 1991-10-31
DE69219273D1 (de) 1997-05-28
JP2740091B2 (ja) 1998-04-15
EP0539939B1 (de) 1997-04-23

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