EP0931309B1 - Einrichtung zum absorbieren und/oder dämpfen von schallwellen - Google Patents

Einrichtung zum absorbieren und/oder dämpfen von schallwellen Download PDF

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Publication number
EP0931309B1
EP0931309B1 EP97938876A EP97938876A EP0931309B1 EP 0931309 B1 EP0931309 B1 EP 0931309B1 EP 97938876 A EP97938876 A EP 97938876A EP 97938876 A EP97938876 A EP 97938876A EP 0931309 B1 EP0931309 B1 EP 0931309B1
Authority
EP
European Patent Office
Prior art keywords
layer
thin
chamber system
sound waves
support
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
EP97938876A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0931309A1 (de
Inventor
Klaus Pfaffelhuber
Gerhard Köck
Stefan Lahner
Thomas Ruhe
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.)
Faist Automotive GmbH and Co KG
Original Assignee
Faist Automotive GmbH and Co KG
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 Faist Automotive GmbH and Co KG filed Critical Faist Automotive GmbH and Co KG
Publication of EP0931309A1 publication Critical patent/EP0931309A1/de
Application granted granted Critical
Publication of EP0931309B1 publication Critical patent/EP0931309B1/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
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • 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
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Definitions

  • the invention relates to a device for absorbing and / or damping sound waves with a sound wave damping and / or insulating chamber system in the preamble of Claim 1 mentioned genus.
  • Absorber devices made of aluminum are also known (EP-A-0557 597. Two aluminum outer layers are replaced by one Sawtooth-like aluminum spacers in Kept apart.
  • plastic packs fiber material and inorganic thermally highly resilient Fiber material made of, for example, basalt stone wool as a sound-absorbing material Cladding for the engine compartment of motor vehicles to form and these packs on the one facing the engine Partly with a reflective heat radiation Laminate aluminum foil.
  • the invention has for its object the establishment of genus mentioned at the outset with simple means to improve that, despite being easy to manufacture, if possible far introduced to sound and possibly heat sources can be and still good acoustic Has insulation and steam properties.
  • the Material used for the facility can be recycled as cheaply as possible or be disposable without harming the environment.
  • the thin, vibratable layer consists of Aluminum or an aluminum alloy with a layer thickness between 0.004 and 0.35 mm; preferably between 0.0045 and 0.020 mm. It has been shown that despite the use one compared to numerous used for cover films Plastics of much more rigid material, here aluminum, such a thin aluminum layer the above task then triggers when it is designed and arranged to vibrate is. "Viability” is understood here to mean the ability execute vibrations when sound waves hit, whose amplitudes also depend on the degrees of freedom of vibration the aluminum foil has between those parts, on which she is supported.
  • the "thin oscillating film” transmits airborne sound waves that hit one side of the same, in the airspace on the other side of the same, even if the "sound pressure" decreases, which finally also advantageous for acoustic damping is.
  • the thin, swingable aluminum layer covers a system of Resonance chambers based on the so-called Helmholtz principle.
  • the thin one Layer covered with a thin thermoplastic layer.
  • the aluminum foil can be used for special sound wave frequency spectra also be at least partially perforated.
  • the unit consisting of the shell-like carrier and in particular the web-shaped spacers are preferably made of GMT (glass fiber reinforced thermoplastic). You can in the injection molding process but also be made by deep drawing.
  • GMT glass fiber reinforced thermoplastic
  • the thin vibratable aluminum layer itself to a chamber system deformed by deep drawing.
  • thermoplastic layer On the aluminum foil to apply by lamination.
  • the thermoplastic layer should consist of polypropylene (PP) (also polyester, Polyethylene or the like would be suitable). It recommends a layer thickness of the same in the area of the same layer thickness order like the thin aluminum layer.
  • PP polypropylene
  • Such Aluminum-thermoplastic composite layer is inexpensive deep-draw, but still maintains sufficient vibratory capacity when impacting sound waves.
  • the aluminum foil can also be a porous aluminum body cover, for example, an aluminum fiber fleece; important is, that the thin aluminum layer is able to vibrate does not lose, even if this is due to the nonwoven Aluminum is somewhat reduced. This "all-aluminum technique" is beneficial for disposal.
  • thermoplastic layer is preferred on that Side of the aluminum foil arranged, which the Sound wave incidence is turned away.
  • the thermoplastic of this Plastic layer can also be used as a connecting means to the structural unit from serving in particular GMT with which the facility is connected to an aggregate by fusion.
  • the vibratable aluminum-thermoplastic composite layer according to the invention has also proven to be advantageous when sticking to the surface facing the engine compartment Bonnet for example of a motor vehicle.
  • Such bonnets are caused by sound waves, particularly the engine generated, often stimulated to vibrate, causing the bonnet itself forms a sound source.
  • the vibratable aluminum foil over the thermoplastic layer works with the hood, which is made especially of metal the oscillatable aluminum layer over the thermoplastic layer also as a damping element for the vibrations of the bonnet. Because the vibration frequencies of the extremely thin aluminum layer on the one hand and the hood's sheet metal on the other the device according to the invention can differ greatly also their job as sound-absorbing and at the same time as a sound absorbing component.
  • the carrier 4 is trough-shaped as a carrier shell educated; it consists e.g. from GMT and is e.g. in the Pre-fabricated deep-drawing process. From the inside 4a of the Carrier shell pull plate-shaped spacers 14 in essentially perpendicular to the plane of the carrier shell up to that Place where they support the spanned vibratable thin aluminum layer 1 one Serve layer thickness of 0.1 mm.
  • the carrier 4 e.g. according to FIG. 2 coated with a thermoplastic layer 8 made of polypropylene and with the edges 4b of the cup-shaped support 4 and with the free ends 14a of the web-shaped spacers 14 are welded (thermal) or glued.
  • a thermoplastic layer 8 made of polypropylene
  • the membrane-like Layer 1 stretched tight.
  • resonance chambers 2 are formed between the carrier shell and the layer 1, resonance chambers 2 are formed.
  • the spacers 14 consist of the same material as the carrier shell and are in one piece with it, for example in Injection molding process.
  • the carrier 4 is as Shaped that, for example, a car partition or a Dashboard forms.
  • a Chamber system for absorbing sound from the engine compartment Sound waves arranged by an aluminum thermoplastic composite film 1a in the schematically shown Deep-drawn and additionally with an aluminum foil 1, which in turn can be laminated with a thermoplastic film, is covered. This creates a system called resonances generated in the chambers 2.
  • FIG. 3 there is a chamber system 11 on the engine compartment 12 facing side of the partition 7 between the engine compartment 12 and Passenger compartment 13 of a motor vehicle 5 is arranged. Moreover is a composite system 10 on the underside of the hood 6 glued that from an aluminum foil 1 and a laminated Foil 8 consists of the plastic PP.
  • the Aluminum foil 1 facing the engine compartment 12 on the free side, while the thermoplastic film 8 on the side of the connection layer to the sheet metal of the hood 6 so that a Vibration system of the aluminum foil 1 on the one hand and the Sheet metal of the hood 6 on the other hand, but with completely different Vibration frequencies arise, which results to dampen vibrations of the hood 6 in the sense of a "deadening" leads.
  • Damping and insulation devices 10 and 11 exist under other in that this is very close to the one Engine units serving as heat sources can be brought up, whereby a significant gain in space is achieved without the functionality of the sound attenuation and Soundproofing devices even when there is a lot of heat is affected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Body Structure For Vehicles (AREA)
  • Building Environments (AREA)
  • Golf Clubs (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
EP97938876A 1996-10-14 1997-08-05 Einrichtung zum absorbieren und/oder dämpfen von schallwellen Expired - Lifetime EP0931309B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29617845U 1996-10-14
DE29617845U DE29617845U1 (de) 1996-10-14 1996-10-14 Einrichtung zum Absorbieren und/oder Dämpfen von Schallwellen
PCT/EP1997/004258 WO1998016915A1 (de) 1996-10-14 1997-08-05 Einrichtung zum absorbieren und/oder dämpfen von schallwellen

Publications (2)

Publication Number Publication Date
EP0931309A1 EP0931309A1 (de) 1999-07-28
EP0931309B1 true EP0931309B1 (de) 2003-01-08

Family

ID=8030556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97938876A Expired - Lifetime EP0931309B1 (de) 1996-10-14 1997-08-05 Einrichtung zum absorbieren und/oder dämpfen von schallwellen

Country Status (12)

Country Link
US (1) US6305494B1 (cs)
EP (1) EP0931309B1 (cs)
JP (1) JP3553614B2 (cs)
KR (1) KR100381740B1 (cs)
AT (1) ATE230887T1 (cs)
CZ (1) CZ294793B6 (cs)
DE (2) DE29617845U1 (cs)
ES (1) ES2185987T3 (cs)
HU (1) HUP0001117A3 (cs)
PL (1) PL185933B1 (cs)
PT (1) PT931309E (cs)
WO (1) WO1998016915A1 (cs)

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DE29803674U1 (de) * 1998-03-03 1999-07-15 M. Faist GmbH & Co. KG, 86381 Krumbach Schichtstoff
DE19838766C1 (de) * 1998-08-26 2000-02-17 Freudenberg Carl Fa Schallisolierendes Formteil und dessen Verwendung sowie Verfahren zu seiner Herstellung
GB2345951A (en) * 1999-01-19 2000-07-26 Draftex Ind Ltd Sound-absorbing structure
DE19952689A1 (de) * 1999-11-02 2001-05-03 Cww Gerko Akustik Gmbh & Co Kg Schalldämmwand und Verwendung derselben
US6528437B1 (en) 1999-11-23 2003-03-04 Milliken & Company Composite fabric for vehicles
DE10034301C2 (de) * 2000-07-14 2002-06-13 Bruss Dichtungstechnik Schallgedämpftes Gehäuse für Geräusch erzeugende Maschinen
DE10128207A1 (de) * 2001-06-11 2002-12-12 Alveo Ag Luzern Wiederverwertbares, Luftschall absorbierendes Formteil und Verfahren zu seiner Herstellung
ITMI20020409A1 (it) * 2002-02-28 2003-08-28 Isopol Srl Elemento di rivestimento ad elevate proprieta' fonoassorbente
JP2004062074A (ja) * 2002-07-31 2004-02-26 Toyota Motor Corp 吸音装置
US6808045B2 (en) * 2002-11-27 2004-10-26 Dow Global Technologies, Inc. Secondary acoustic attenuator for vehicle
CA2512596A1 (en) * 2003-01-07 2004-07-29 Michael T. Campbell Molded lightweight foam acoustical barrier and its method of application
JP4050632B2 (ja) * 2003-02-24 2008-02-20 株式会社神戸製鋼所 吸音構造体
US6966402B2 (en) * 2003-06-02 2005-11-22 Dana Corporation Acoustical heat shield
US20040247819A1 (en) * 2003-06-09 2004-12-09 3M Innovative Properties Company Casing-free insulation blanket
DE10332833B4 (de) * 2003-07-18 2005-07-28 Siemens Ag Schalldämpfungsvorrichtung mit Oberflächenmembran
DE20320100U1 (de) * 2003-12-23 2005-05-12 Carcoustics Tech Center Gmbh Luftschallabsorbierendes Bauteil
JP4543715B2 (ja) * 2004-03-23 2010-09-15 日産自動車株式会社 エンジンフード構造体
DE102004053751A1 (de) * 2004-11-06 2006-05-11 Seeber Ag & Co. Kg Akustik-Verkleidungsteil für ein Fahrzeug
JP4795712B2 (ja) * 2005-04-21 2011-10-19 パイオニア株式会社 スピーカー装置用振動系部品及びその製造方法
DE102005029729A1 (de) * 2005-06-24 2006-12-28 Röchling Automotive AG & Co. KG Verkleidungs- oder Gehäuseteil eines Fahrzeugs und Verfahren zu seiner Herstellung
JP4845493B2 (ja) * 2005-12-02 2011-12-28 キヤノン株式会社 画像形成装置
JP4785571B2 (ja) * 2006-03-13 2011-10-05 ダイキョーニシカワ株式会社 車両のドア構造
US7520370B2 (en) * 2006-05-17 2009-04-21 William Orlin Gudim Combination acoustic diffuser and absorber and method of production thereof
JP4312221B2 (ja) * 2006-09-29 2009-08-12 株式会社クボタ トラクタ
US20080099278A1 (en) * 2006-10-30 2008-05-01 Lear Corporation Acoustic insulator and method of manufacturing same
JP5359167B2 (ja) * 2008-10-07 2013-12-04 ヤマハ株式会社 車体構造体および荷室
JP5257203B2 (ja) * 2009-03-31 2013-08-07 アイシン精機株式会社 エンジンカバー構造
DE102010041666A1 (de) 2010-09-29 2012-05-03 Röchling Automotive AG & Co. KG Kfz-Abgasführungsvorrichtung mit einem Funktionsgehäuse und einem Abgas-Kanal
US9260064B2 (en) * 2011-11-30 2016-02-16 Honda Motor Co., Ltd. Heat reflective material
JP6041617B2 (ja) * 2012-10-22 2016-12-14 株式会社イノアックコーポレーション 吸音構造体
JP6165466B2 (ja) * 2013-02-27 2017-07-19 株式会社神戸製鋼所 防音構造
DE102014218730A1 (de) 2014-09-18 2016-03-24 Ford Global Technologies, Llc Energieabsorber und Überkopfsystem mit Energieabsorber
DE102014218731A1 (de) * 2014-09-18 2016-03-24 Ford Global Technologies, Llc Energieabsorber und Überkopfsystem mit Energieabsorber
US20180028159A1 (en) * 2016-07-29 2018-02-01 Butterfly Network, Inc. Rearward acoustic diffusion for ultrasound-on-a-chip transducer array
JP7394673B2 (ja) * 2020-03-19 2023-12-08 河西工業株式会社 自動車用遮音パネル
US20230326444A1 (en) * 2022-04-12 2023-10-12 GM Global Technology Operations LLC Cast cover with integrated noise mitigation method

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Also Published As

Publication number Publication date
ATE230887T1 (de) 2003-01-15
CZ132299A3 (cs) 1999-11-17
CZ294793B6 (cs) 2005-03-16
JP3553614B2 (ja) 2004-08-11
HUP0001117A3 (en) 2003-01-28
HUP0001117A2 (hu) 2000-08-28
PT931309E (pt) 2003-04-30
JP2001507470A (ja) 2001-06-05
PL332825A1 (en) 1999-10-11
PL185933B1 (pl) 2003-09-30
KR20000049116A (ko) 2000-07-25
DE59709111D1 (de) 2003-02-13
KR100381740B1 (ko) 2003-04-26
ES2185987T3 (es) 2003-05-01
US6305494B1 (en) 2001-10-23
EP0931309A1 (de) 1999-07-28
WO1998016915A1 (de) 1998-04-23
DE29617845U1 (de) 1998-02-12

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