FR2783562A1 - Automobile exhaust noise reduction system, generates an anti-noise signal via a loudspeaker - Google Patents

Automobile exhaust noise reduction system, generates an anti-noise signal via a loudspeaker Download PDF

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Publication number
FR2783562A1
FR2783562A1 FR9811877A FR9811877A FR2783562A1 FR 2783562 A1 FR2783562 A1 FR 2783562A1 FR 9811877 A FR9811877 A FR 9811877A FR 9811877 A FR9811877 A FR 9811877A FR 2783562 A1 FR2783562 A1 FR 2783562A1
Authority
FR
France
Prior art keywords
noise
line
noise signal
loudspeaker
generates
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
FR9811877A
Other languages
French (fr)
Other versions
FR2783562B1 (en
Inventor
Vincent Fortoul
Christian Charles Garabedian
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.)
ECIA Equipements et Composants pour lIndustrie Automobile SA
Original Assignee
ECIA Equipements et Composants pour lIndustrie Automobile SA
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.)
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Publication date
Application filed by ECIA Equipements et Composants pour lIndustrie Automobile SA filed Critical ECIA Equipements et Composants pour lIndustrie Automobile SA
Priority to FR9811877A priority Critical patent/FR2783562B1/en
Priority to DE19945653A priority patent/DE19945653A1/en
Publication of FR2783562A1 publication Critical patent/FR2783562A1/en
Application granted granted Critical
Publication of FR2783562B1 publication Critical patent/FR2783562B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • F01N1/065—Silencing apparatus characterised by method of silencing by using interference effect by using an active noise source, e.g. speakers
    • 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
    • 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
    • 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
    • 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
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • 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
    • G10K2210/12822—Exhaust pipes or mufflers
    • 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
    • G10K2210/50—Miscellaneous
    • G10K2210/51—Improving tonal quality, e.g. mimicking sports cars

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • General Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The motor vehicle exhaust noise reducer has a microphone (2), to control residual exhaust system noise, connected to an anti-noise computer (3) which generates a anti-noise signal which drives an electro-acoustic transducer, loudspeaker (4) in the exhaust system (1) so that noise is reduced. The computer (3) includes a synthesized signal generator (5) designed to superposed with the anti-noise signal.

Description

La présente invention concerne un système anti-bruit pour ligneThe present invention relates to an anti-noise system for line

d'échappement de véhicule automobile.  motor vehicle exhaust.

On connaît déjà dans l'état de la technique, des systèmes anti-bruit de  Are already known in the prior art, anti-noise systems

ce type qui comportent des moyens de relevé de bruit résiduel de ligne, raccor-  this type which include means for recording residual line noise, connecting

dés à un calculateur d'anti-bruit, de génération d'un signal d'anti- bruit de pilotage de moyens à haut-parleur associés à la ligne, pour engendrer un anti-bruit de ligne. De tels systèmes ont été développés dans l'état de la technique, pour réduire le niveau des nuisances sonores émises lors du fonctionnement des  dice to an anti-noise calculator, for generating an anti-noise signal for driving loudspeaker means associated with the line, to generate a line anti-noise. Such systems have been developed in the state of the art, to reduce the level of noise pollution emitted during the operation of

moteurs de véhicule.vehicle engines.

Le but d'un tel système est en effet d'analyser le bruit résiduel de ligne  The purpose of such a system is indeed to analyze the residual line noise

pour engendrer un anti-bruit permettant de réduire au maximum ce bruit résiduel.  to generate an anti-noise to minimize this residual noise.

Le but de l'invention est de perfectionner ce système pour en accroître  The object of the invention is to improve this system in order to increase it

les fonctionnalités.fonctionnalities.

A cet effet, I'invention a pour objet un système anti-bruit pour ligne  To this end, the invention relates to an anti-noise system for line

d'échappement de véhicule automobile, du type comportant des moyens de rele-  motor vehicle exhaust, of the type comprising means for relieving

vé de bruit résiduel de ligne, raccordés à un calculateur d'anti-bruit, de généra-  of residual line noise, connected to a noise canceling computer, generally

tion d'un signal d'anti-bruit de pilotage de moyens à transducteur électro-  tion of an anti-noise signal for controlling means with an electro- transducer

acoustique associés à la ligne, pour engendrer un anti-bruit de ligne, caractérisé  acoustic associated with the line, to generate anti-line noise, characterized

en ce que le calculateur comporte en outre des moyens de génération d'un si-  in that the computer further comprises means for generating a si-

gnal de bruit de synthèse adapté pour être superposé sur le signal d'anti-bruit.  general synthesis noise adapted to be superimposed on the anti-noise signal.

L'invention sera mieux comprise à l'aide de la description qui va sui-  The invention will be better understood with the aid of the description which follows.

vre, donnée uniquement à titre d'exemple et faite en se référant au dessin an-  glass, given only by way of example and made with reference to the drawing an-

nexé qui représente un schéma synoptique illustrant la structure générale d'un  nexé which represents a synoptic diagram illustrating the general structure of a

système anti-bruit selon l'invention.  anti-noise system according to the invention.

On reconnaît en effet sur cette figure, un système anti-bruit pour ligne  We recognize in this figure, an anti-noise system for line

d'échappement de véhicule automobile désignée par la référence générale 1.  motor vehicle exhaust designated by the general reference 1.

Ce système comporte de façon classique des moyens de relevé de bruit résiduel de ligne, désignés par la référence générale 2 et constitués par  This system conventionally comprises means for recording residual line noise, designated by the general reference 2 and constituted by

exemple par tout microphone approprié.  example by any suitable microphone.

Ces moyens 2 de relevé de bruit résiduel de ligne sont raccordés à un calculateur d'anti-bruit désigné par la référence générale 3, de génération d'un signal d'anti-bruit de pilotage de moyens à transducteur électro-acoustique tels  These means 2 for recording residual line noise are connected to an anti-noise calculator designated by the general reference 3, for generating an anti-noise signal for controlling means with an electro-acoustic transducer such

qu'un haut-parleur, associés à la ligne, ces moyens étant désignés par la réfé-  than a loudspeaker, associated with the line, these means being designated by the reference

rence générale 4 et permettant d'engendrer un anti-bruit de ligne.  general reference 4 and making it possible to generate anti-line noise.

Une telle structure est classique et ne sera donc pas décrite dans le  Such a structure is conventional and will therefore not be described in the

détail par la suite.detail later.

Selon l'invention, le calculateur 3 comporte en outre des moyens 5 de génération d'un signal de bruit de synthèse, adapté pour être superposé par exemple en 6 sur le signal d'anti-bruit destiné à piloter les moyens à transducteur 4. Des moyens de modification de ce bruit de synthèse engendré par le calculateur d'anti-bruit, peuvent également être associés à celui-ci, ces moyens étant désignés par la référence générale 7 et pouvant par exemple être pilotés  According to the invention, the computer 3 also comprises means 5 for generating a synthesis noise signal, adapted to be superimposed for example at 6 on the anti-noise signal intended to drive the transducer means 4. Means for modifying this synthesis noise generated by the anti-noise computer, can also be associated with it, these means being designated by the general reference 7 and which can, for example, be controlled

par un utilisateur.by a user.

On conçoit alors qu'avec un tel système, il est possible grâce à la  It is therefore conceivable that with such a system, it is possible thanks to the

fonction d'anti-bruit, non seulement d'éliminer le bruit non désirable de fonction-  anti-noise function, not only to eliminate unwanted noise from function-

nement de la ligne d'échappement, mais également de piloter les moyens à  the exhaust line, but also to control the means to

transducteur à l'aide d'un signal de bruit de synthèse plus agréable à écouter.  transducer using a synthetic noise signal more pleasant to listen to.

Il va de soi bien entendu que différents modes de réalisation d'un tel  It goes without saying of course that different embodiments of such a

système peuvent être envisagés.system can be considered.

Claims (2)

REVENDICATIONS 1. Système anti-bruit pour ligne d'échappement de véhicule automo-  1. Anti-noise system for motor vehicle exhaust line bile, du type comportant des moyens (2) de relevé de bruit résiduel de ligne, rac-  bile, of the type comprising means (2) for detecting residual line noise, cordés à un calculateur d'anti-bruit (3), de génération d'un signal d'anti-bruit de pilotage de moyens à transducteur électro-acoustique (4) associés à la ligne (1), pour engendrer un anti-bruit de ligne, caractérisé en ce que le calculateur (3) comporte en outre des moyens (5) de génération d'un signal de bruit de synthèse  strung to an anti-noise calculator (3), for generating an anti-noise signal for controlling electro-acoustic transducer means (4) associated with the line (1), to generate anti-noise line, characterized in that the computer (3) further comprises means (5) for generating a synthetic noise signal adapté pour être superposé (en 6) sur le signal d'anti-bruit.  adapted to be superimposed (in 6) on the anti-noise signal. 2. Système selon la revendication 1, caractérisé en ce qu'il comporte des moyens (5) de modification du signal de bruit de synthèse engendré par le  2. System according to claim 1, characterized in that it comprises means (5) for modifying the synthetic noise signal generated by the calculateur d'anti-bruit (3).anti-noise calculator (3).
FR9811877A 1998-09-23 1998-09-23 ANTI-NOISE SYSTEM FOR VEHICLE EXHAUST LINE Expired - Fee Related FR2783562B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9811877A FR2783562B1 (en) 1998-09-23 1998-09-23 ANTI-NOISE SYSTEM FOR VEHICLE EXHAUST LINE
DE19945653A DE19945653A1 (en) 1998-09-23 1999-09-23 Soundproofing system for exhaust systems of motor vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9811877A FR2783562B1 (en) 1998-09-23 1998-09-23 ANTI-NOISE SYSTEM FOR VEHICLE EXHAUST LINE

Publications (2)

Publication Number Publication Date
FR2783562A1 true FR2783562A1 (en) 2000-03-24
FR2783562B1 FR2783562B1 (en) 2000-12-15

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FR9811877A Expired - Fee Related FR2783562B1 (en) 1998-09-23 1998-09-23 ANTI-NOISE SYSTEM FOR VEHICLE EXHAUST LINE

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FR (1) FR2783562B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7059820B2 (en) 2002-07-19 2006-06-13 Honeywell International, Inc. Noise control
DE102005011747B3 (en) * 2005-03-11 2006-06-29 Benteler Automobiltechnik Gmbh Active exhaust gas silencer for motor vehicle has membrane set in flexural oscillations by excitation by converter so that on surface facing exhaust gas flow structure-borne noise tuned to exhaust gas noise is created

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805733A (en) * 1987-07-07 1989-02-21 Nippondenso Co., Ltd. Active silencer
WO1990013109A1 (en) * 1989-04-20 1990-11-01 Group Lotus Plc Sound synthesizer in a vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805733A (en) * 1987-07-07 1989-02-21 Nippondenso Co., Ltd. Active silencer
WO1990013109A1 (en) * 1989-04-20 1990-11-01 Group Lotus Plc Sound synthesizer in a vehicle

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Publication number Publication date
FR2783562B1 (en) 2000-12-15
DE19945653A1 (en) 2000-04-20

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Effective date: 20100531