EP0898774B1 - Amortisseur de bruit reactif - Google Patents

Amortisseur de bruit reactif Download PDF

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Publication number
EP0898774B1
EP0898774B1 EP97923077A EP97923077A EP0898774B1 EP 0898774 B1 EP0898774 B1 EP 0898774B1 EP 97923077 A EP97923077 A EP 97923077A EP 97923077 A EP97923077 A EP 97923077A EP 0898774 B1 EP0898774 B1 EP 0898774B1
Authority
EP
European Patent Office
Prior art keywords
membrane
sound
reactive
acoustic
sensor
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.)
Expired - Lifetime
Application number
EP97923077A
Other languages
German (de)
English (en)
Other versions
EP0898774A1 (fr
Inventor
Jan Krüger
Philip Leistner
Helmut Fuchs
Roland Lippold
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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
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Application filed by Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority to SI9730209T priority Critical patent/SI0898774T1/xx
Publication of EP0898774A1 publication Critical patent/EP0898774A1/fr
Application granted granted Critical
Publication of EP0898774B1 publication Critical patent/EP0898774B1/fr
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
    • G10K11/17857—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
    • G10K2210/112—Ducts
    • 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
    • G10K2210/321—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
    • G10K2210/3227—Resonators
    • G10K2210/32271—Active resonators

Definitions

  • the invention relates to a reactive absorbing silencer (hereinafter more reactive Called silencer) according to the preamble of claim 1.
  • Active Helmholtz resonators represent a variant of the basic idea of hybrid silencers according to - DE 42 26 885 and Spannheimer, H., Freymann, R., Fastl, H .: Aktiver Helmholtz resonator for damping cavity vibrations. Progress der Akustik - DAGA 1994, DPG-GmbH, Bad Honnef: 1994, pp. 525-528, -dar, picture 7, preferably with the area of application in motor vehicles.
  • Here represents a conventional Helmholtz resonator the passive described in DE 40 27 511 Subsystem that is actively influenced on its back. In detail it is on known Helmholtz resonator through a hollow body (16) and an opening (17) defined.
  • the one provided outside the Helmholtz resonator next to the opening Microphone (18) provides information about the sound pressure prevailing there, with which a transmission system (20) with special (PDT) frequency and time behavior the required voltage for the speaker (19) generated in the hollow body.
  • This Loudspeaker determines or changes the transmission behavior (resonance frequency) of the original Helmholtz resonator.
  • the loudspeaker in the hollow body thus serves the practical enlargement (general change) of the hollow body volume for improved Sound absorption of the Helmholtz resonator at low frequencies.
  • the goal here there is therefore an active reduction in the resonance frequency and thus the sound absorption of the passive Helmholtz resonator.
  • the object of the invention is to adjust the efficiency of the reactive silencer to increase the preamble of claim 1 and to reduce the technical outlay. According to the invention, this is achieved by the reactive muffler according to claim 1 solved.
  • Advantageous embodiments of the invention are characterized in the subclaims.
  • the invention relates to a reactive silencer, in which both the detection as well as the active influencing of the sound field directly and immediately the duct wall (1) takes place, Figure 1.
  • the basic building block is a closed, compact one Cassette (2) in which all components are summarized. Your front is part of the channel wall and is covered by at least one vibratable membrane (3), e.g. a loudspeaker membrane, embodied.
  • This membrane (3) forms by its area Mass with the cavity (4) of the cassette housing behind it an acoustic resonance system. The occurring sound waves in the sewer rain this resonance system at and near its natural frequency to vibrate on.
  • the activation takes place with the help of a sensor (5), which is in the immediate vicinity, is arranged in or on the membrane (3) and detects the membrane vibrations.
  • This sensor function can e.g. Microphones, structure-borne sound sensors or optical Take over motion sensors.
  • the output signal of the sensor is used after a inverting, linear amplification (6) of the control of an electroacoustic Transducer (7), e.g. the voice coil of a speaker.
  • the membrane is forced to vibrate more, the sound pressure on the lined wall surface thus further reduced and the sound wave more subdued.
  • the shape of the housing (2) can be varied, since only the volume of the cavity (4) affects the frequency characteristic.
  • absorbers can be provided inside the housing (2), which is soundproof his.
  • the principle-related linear amplifier (6) contains no frequency weighting of the sensor signal in order to use filters, signal formers or other transmission systems to avoid associated unwanted phase shifts. This prevents disturbing acoustic interactions between neighboring ones Cassettes and large-area, reactive silencers made of many individual cassettes, e.g. in reactive silencer backdrops, Figure 2, are possible.
  • the provision of the operating voltages for the sensors (5) and amplifiers (6) is done by conventional Power supplies or batteries.
  • the measured insertion loss of an example reactive silencer, Figure 3, consisting of 4 cassettes, is in Figure 4 shown.
  • the reactive silencer comes without passive subsystems (porous absorbers, Helmholtz resonators etc.). This fact as well as the spatial concentration of membrane (3) and sensor (5) in the channel wall allow the use of a simple amplifier (6). This allows all components of the reactive silencer to be used can be easily integrated in a compact housing (2).
  • the reactive silencer is connected to any sound field and to any sound field limitation, e.g. Channel redirection, adaptable.
  • the reactive silencer cassettes and thus all electroacoustic components can be acoustic using permeable covers against physical and chemical occurring in the channel Loads are protected.
  • An embodiment of the reactive silencer sees the use of a Microphones as sensors (5) whose positioning behind the membrane (3), i.e. in the cavity (4) of the cassette (2).
  • the principle of operation of the reactive silencer is not only applicable to flat waves in comparatively narrow channels, but also also effects a damping of modal sound fields in any channels or rooms.
  • the vibrating membranes reduce the reactive Cassettes also cover the sound pressure on the lined wall surface and dampen the existing sound field.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Duct Arrangements (AREA)

Claims (6)

  1. Amortisseur de bruit à absorption réactive composé d'une cavité (4) restreinte de façon non transmettante du son, à au moins une membrane (3), d'un détecteur (5) acoustique à proximité immédiate ou dans ou à ladite membrane (3), ainsi que d'un convertisseur électroacoustique (7), qui produit ses effets sur ladite membrane, et d'un amplificateur des signaux (6) à inversion, les vibrations de résonance de la membrane (3), qui sont détectées par ledit détecteur (5), étant amplifiées moyennant ledit amplificateur des signaux (6) et ledit convertisseur électroacoustique (7),
    caractérisé en ce
    que
    pour l'absorption du son, ladite membrane constitue une partie de la paroi d'une enceinte,
    que, vue en départ de l'enceint, ladite cavité (4) est disposée du côté arrière de ladite membrane et la masse acoustique de ladite membrane (3) à l'élasticité acoustique de ladite cavité en tant qu'absorbeur de résonance est accordée à la vibration dans l'enceinte, qui requiert le plus fort amortissement, et en ce
    que ledit amplificateur des signaux (6) fonctionne d'une manière linéaire et présente une loi de fréquence des amplitudes à deux dimensions.
  2. Amortisseur de bruit réactif selon la revendication 1,
    caractérisé en ce
    que le volume de ladite cavité (4) est accordé au champ sonore à amortir.
  3. Amortisseur de bruit réactif selon la revendication 1,
    caractérisé en ce
    que ledit détecteur (5) est un détecteur acoustique ou optique, et détecte la pression, la vitesse ou le mouvement de ladite membrane (3).
  4. Amortisseur de bruit réactif selon la revendication 1,
    caractérisé en ce
    que ledit convertisseur électro-acoustique (7) est un simple haut-plarleur linéaire.
  5. Amortisseur de bruit réactif selon la revendication 1,
    caractérisé en ce
    qu'un couvercle à transmission acoustique est disposé avant ou sur ladite membrane (3).
  6. Amortisseur de bruit réactif selon la revendication 1,
    caractérisé en ce
    qu'une pluralité d'amortisseurs de bruit est disposeé l'un du côté de l'autre à deux dimensions dans une paroi de canal (1), un canal d'écoulement ou dans des coulisses amortisseurs de bruit.
EP97923077A 1996-05-14 1997-05-14 Amortisseur de bruit reactif Expired - Lifetime EP0898774B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9730209T SI0898774T1 (en) 1996-05-14 1997-05-14 Reactive sound absorber

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19619466 1996-05-14
DE19619466 1996-05-14
PCT/EP1997/002471 WO1997043754A1 (fr) 1996-05-14 1997-05-14 Amortisseur de bruit reactif

Publications (2)

Publication Number Publication Date
EP0898774A1 EP0898774A1 (fr) 1999-03-03
EP0898774B1 true EP0898774B1 (fr) 2001-08-01

Family

ID=7794315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97923077A Expired - Lifetime EP0898774B1 (fr) 1996-05-14 1997-05-14 Amortisseur de bruit reactif

Country Status (9)

Country Link
US (1) US6385321B1 (fr)
EP (1) EP0898774B1 (fr)
AT (1) ATE203849T1 (fr)
DE (1) DE59704196D1 (fr)
DK (1) DK0898774T3 (fr)
ES (1) ES2162292T3 (fr)
GR (1) GR3037001T3 (fr)
PT (1) PT898774E (fr)
WO (1) WO1997043754A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005048905B3 (de) * 2005-10-10 2006-08-31 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Aktiver Kanalschalldämpfer

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6778673B1 (en) * 1998-10-28 2004-08-17 Maximilian Hans Hobelsberger Tunable active sound absorbers
DE19861018C2 (de) 1998-12-15 2001-06-13 Fraunhofer Ges Forschung Gesteuerter akustischer Wellenleiter zur Schalldämpfung
GB9920883D0 (en) * 1999-09-03 1999-11-10 Titon Hardware Ventilation assemblies
DE10019543C2 (de) * 2000-04-20 2002-03-07 Fraunhofer Ges Forschung Zuluftelement
US6940983B2 (en) * 2000-05-19 2005-09-06 Siemens Vdo Automotive Inc. Resonator for active noise attenuation system
DE102006010558A1 (de) * 2006-03-06 2007-09-13 J. Eberspächer GmbH & Co. KG Aktiver Schalldämpfer für eine Abgasanlage
DE102006042224B3 (de) * 2006-09-06 2008-01-17 J. Eberspächer GmbH & Co. KG Aktiver Schalldämpfer für eine Abgasanlage
US7789194B2 (en) * 2007-04-20 2010-09-07 Cardinal Health 212, Inc. Acoustic attenuation chamber
DE102007032600A1 (de) * 2007-07-11 2009-01-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Vorrichtung und Verfahren zur Verbesserung der Dämpfung von akustischen Wellen
DE102009041890A1 (de) 2009-09-18 2011-06-01 Benteler Automobiltechnik Gmbh Schalldämpfer und Schalldämpferanordnung
AT510851B1 (de) * 2011-03-16 2012-07-15 Schertler Sa Vibrationserfassungseinrichtung für frequenzen im hörbereich
EP2901711B1 (fr) * 2012-09-24 2021-04-07 Cirrus Logic International Semiconductor Limited Commande et protection de haut-parleurs
DE102013210709A1 (de) 2013-06-07 2014-12-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Schallstrahler-Anordnung für aktive Schalldämpfer
FR3043177B1 (fr) 2015-11-02 2019-08-23 Technofirst Installation pour la ventilation naturelle d'un local
FR3043179A1 (fr) 2015-11-02 2017-05-05 Technofirst Installation pour la ventilation naturelle d'un local presentant un passage de ventilation associe a un amortisseur de bruit
FR3043178B1 (fr) 2015-11-02 2019-08-23 Technofirst Installation pour la ventilation naturelle d'un local pourvue d'un amortisseur de bruit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632474B1 (fr) 1988-06-01 1991-04-26 Saint Louis Inst Dispositif d'attenuation active de vibrations et notamment de bruit sans retard acoustique
US5233137A (en) 1990-04-25 1993-08-03 Ford Motor Company Protective anc loudspeaker membrane
DE4027511C1 (fr) * 1990-08-30 1991-10-02 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen, De
US6160892A (en) * 1993-12-30 2000-12-12 Bbn Corporation Active muffler
DE4419933A1 (de) 1994-06-08 1995-12-14 Gerhard Dr Lindner Vorrichtung und Verfahren zur Schallerzeugung zum Schallnachweis und zur aktiven Schalldämpfung
US6078671A (en) * 1996-09-05 2000-06-20 Ebara Corporation Silencer for attenuating a sound or noise transmitted through an air passage of a duct

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005048905B3 (de) * 2005-10-10 2006-08-31 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Aktiver Kanalschalldämpfer

Also Published As

Publication number Publication date
ATE203849T1 (de) 2001-08-15
DE59704196D1 (de) 2001-09-06
ES2162292T3 (es) 2001-12-16
WO1997043754A1 (fr) 1997-11-20
US6385321B1 (en) 2002-05-07
EP0898774A1 (fr) 1999-03-03
GR3037001T3 (en) 2002-01-31
DK0898774T3 (da) 2001-10-22
PT898774E (pt) 2002-01-30

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