WO1998016915A1 - Einrichtung zum absorbieren und/oder dämpfen von schallwellen - Google Patents
Einrichtung zum absorbieren und/oder dämpfen von schallwellen Download PDFInfo
- Publication number
- WO1998016915A1 WO1998016915A1 PCT/EP1997/004258 EP9704258W WO9816915A1 WO 1998016915 A1 WO1998016915 A1 WO 1998016915A1 EP 9704258 W EP9704258 W EP 9704258W WO 9816915 A1 WO9816915 A1 WO 9816915A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- aluminum
- thin
- carrier
- sound waves
- Prior art date
Links
- 238000013016 damping Methods 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 54
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 3
- 239000011888 foil Substances 0.000 claims description 23
- 229920001169 thermoplastic Polymers 0.000 claims description 21
- 239000004416 thermosoftening plastic Substances 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 5
- 125000006850 spacer group Chemical class 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 abstract 1
- 230000030279 gene silencing Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001743 silencing effect Effects 0.000 abstract 1
- 210000003660 reticulum Anatomy 0.000 description 10
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 241001676573 Minium Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920006264 polyurethane film Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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 system using a thin, vibratable layer on the side facing the sound wave incident.
- Such a device is already known (DE-OS 33 13 001).
- This device is formed by a porous base layer, which has projecting areas for forming hollow chambers, which are covered by a covering film of a layer thickness of preferably 30 / m, which is placed over the projecting areas.
- the porous base layer acts as a sound absorber at higher frequencies, while the film acts as a membrane absorber at lower frequencies.
- the invention has for its object to improve the device of the type mentioned with simple means to the effect that it can be brought as far as possible to sound and possibly heat sources despite simple producibility and yet has long-term good acoustic insulation and damping properties.
- the material used for the facility should be recyclable or disposable as cheaply as possible without affecting the environment.
- the thin, vibratable layer made 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.
- “Vibration capability” is understood here to mean the ability to carry out vibrations when sound waves hit, the amplitudes of which also depend on the degree of vibration freedom of the aluminum foil between the parts on which it is supported.
- the "thin oscillating film” transmits airborne sound waves that hit one side of it into the airspace on the other side of the same, even if the "sound pressure" decreases, which is also advantageous for acoustic damping.
- the thin, vibratable aluminum layer preferably covers a system of resonance chambers based on the so-called Helmholtz principle.
- the aluminum foil can also be at least partially perforated for special sound wave frequency spectra.
- the thin, vibratable aluminum layer is itself deformed into a chamber system by deep drawing.
- a thermoplastic layer which can be done, for example, by lamination.
- This thermoplastic layer should consist of polypropylene (PP) (polyester, polyethylene or the like would also be suitable).
- PP polypropylene
- a layer thickness of the same in the region of the same layer thickness order as the thin aluminum layer is recommended.
- Such an aluminum-thermoplastic composite layer leaves deeply draw itself, but still maintains sufficient vibration ability when sound waves hit it.
- the aluminum foil can also cover a porous aluminum body, for example an aluminum fiber fleece; It is important that the thin aluminum layer does not lose its ability to vibrate, even if this is somewhat reduced by the aluminum fiber fleece. This "all-aluminum technique" is advantageous for disposal.
- thermoplastic plastic layer is preferably arranged on that side of the aluminum foil which faces away from the sound wave incident.
- the thermoplastic of this plastic layer can also serve as a connecting means to a carrier made in particular of GMT (glass mat-reinforced thermoplastic), with which the device is connected to an aggregate by fusing.
- GMT glass mat-reinforced thermoplastic
- the vibratable aluminum-thermoplastic composite layer according to the invention has also proven to be advantageous, moreover, when adhering to the surface of a hood facing the engine compartment, for example of a motor vehicle.
- Such bonnets are often excited to vibrate by sound waves, which in particular the engine generates, whereby the bonnet itself forms a sound source.
- the vibratable aluminum foil over the thermoplastic layer with the bonnet, which is made especially of metal, the vibratable aluminum layer over the thermoplastic layer also acts as a damping element for the vibrations of the bonnet. Since the oscillation frequencies of the extremely thin aluminum layer on the one hand and the sheet metal of the bonnet on the other hand differ greatly, the device according to the invention can also perform its function as a sound-absorbing and at the same time as a sound-damping component fulfill.
- FIG. 1 shows a schematic cross section through a device according to the invention
- FIG. 2 shows a further embodiment with a deep-drawn aluminum-thermoplastic composite film
- Figure 3 shows a further embodiment of the invention with two aluminum foils in a schematic cross section
- FIG. 4 shows a motor vehicle in a side view with the engine compartment partially broken open
- FIG. 5 shows an enlarged cross section through an aluminum-thermoplastic composite film
- FIG. 6 shows a cross-section of a further embodiment of the invention and, in FIG. 5, includes a top view of the embodiment of FIG. 6 with the aluminum foil partially broken off;
- FIG. 7 shows a further embodiment of the invention with a system of resonance chambers connected to one another by channels and
- Figure 8 shows another version and Figure 9 shows a partial section C-C
- Figure 10 shows another preferred embodiment in section.
- an aluminum foil 1 with a layer thickness of 0.01 mm is drawn along so that the chambers 2 are covered. Since the aluminum foil 1 is capable of vibrating for the sound waves in question, the chambers 2 covered by this foil 1 act as resonance chambers when the foil parts covering these chambers 2 vibrate. By choosing the size of the resonance chambers and therefore also the size of the vibratable parts of the aluminum foil 1, the sound absorption can be expanded over a wide frequency spectrum.
- a tube system 11 is formed by deep-drawing a composite film, which is formed from the oscillatable aluminum film 1 and a thermoplastic film 8 made of PP and laminated on the underside thereof.
- a mechanical connection is made, for example, by welding to the GMT material of the carrier 4.
- the chambers 2 are not covered on the outside.
- broadband sound wave absorption arises due to the different depth and size of the chambers 2.
- the carrier 4 is shaped as a shell, which for example forms a motor vehicle partition or a dashboard.
- a chamber system for sound absorbing the sound waves incident from the engine compartment is arranged by deep-drawing an aluminum-thermoplastic composite film la in the schematically illustrated manner and additionally covering it with an aluminum film 1, which in turn can be laminated with a thermoplastic film .
- such a chamber system 11 is arranged on the side of the partition 7 facing the engine compartment 12 between the engine compartment 12 and the passenger compartment 13 of a motor vehicle 5.
- a composite system 10 is glued to the underside of the bonnet 6, which according to FIG. 5 consists of an aluminum foil 1 and a laminated foil 8 made of the plastic p / > .
- the aluminum foil 1 on the free side A faces the engine compartment 12, while the thermoplastic foil 8 on the side B creates the connection layer to the sheet of the bonnet 6, so that a vibration system of the aluminum foil 1 on the one hand and the sheet of the bonnet 6 on the other, but with Completely different vibration frequencies arise, which results in a damping of vibrations of the bonnet 6 in the sense of "deadening".
- the advantage of the damping and insulation devices 10 and 11 according to the invention is, inter alia, that they can be brought very far to the motor units which simultaneously serve as a heat source, thereby achieving a considerable gain in space without the functionality of the sound damping and sound according to the invention - Insulation devices are impaired even when there is a lot of heat.
- the porous body 3 made of, in particular, aluminum fleece or other easily recyclable or disposable material is provided with tubular chambers 2, which are aligned at different angles with respect to the support 4 and also to the covering aluminum foil 1, which is oscillatable.
- the vibratable aluminum foil 1 covers the porous body 3 so that the thin aluminum foil 1 remains oscillatable in a certain sense, so that the air space in chamber 2 is excited to oscillate. From there, air vibrations continue through the transverse channels 2a and 2b with different lengths and the advantage that a very wide frequency spectrum of sound waves can be absorbed by this chamber system.
- the carrier 4 is trough-shaped as a carrier shell; it exists e.g. from GMT and is prefabricated using the deep-drawing process.
- plate-shaped spacers 14 extend essentially perpendicular to the plane of the carrier shell to the point at which they serve to support the oscillatable thin aluminum layer 1 with a layer thickness of 0.1 mm. This is inside, facing the carrier 4, coated with a thermoplastic layer made of polypropylene and welded (thermally) or glued to the edges 4b of the shell-shaped carrier 4 and to the free ends 14a of the web-shaped spacers 14.
- the membrane-like layer 1 is stretched tight.
- Resonance chambers 4 are formed between the carrier shell and the layer 1.
- the spacers 14 are made of the same material as the carrier shell and are preferably made in one piece with it, for example by injection molding.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (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)
- Diaphragms For Electromechanical Transducers (AREA)
- Golf Clubs (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51794098A JP3553614B2 (ja) | 1996-10-14 | 1997-08-05 | 音波の吸収および/または減衰装置 |
PL97332825A PL185933B1 (pl) | 1996-10-14 | 1997-08-05 | Urządzenie do pochłaniania i tłumienia fal dźwiękowych |
AT97938876T ATE230887T1 (de) | 1996-10-14 | 1997-08-05 | Einrichtung zum absorbieren und/oder dämpfen von schallwellen |
EP97938876A EP0931309B1 (de) | 1996-10-14 | 1997-08-05 | Einrichtung zum absorbieren und/oder dämpfen von schallwellen |
DE59709111T DE59709111D1 (de) | 1996-10-14 | 1997-08-05 | Einrichtung zum absorbieren und/oder dämpfen von schallwellen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29617845.4 | 1996-10-14 | ||
DE29617845U DE29617845U1 (de) | 1996-10-14 | 1996-10-14 | Einrichtung zum Absorbieren und/oder Dämpfen von Schallwellen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998016915A1 true WO1998016915A1 (de) | 1998-04-23 |
Family
ID=8030556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/004258 WO1998016915A1 (de) | 1996-10-14 | 1997-08-05 | Einrichtung zum absorbieren und/oder dämpfen von schallwellen |
Country Status (12)
Country | Link |
---|---|
US (1) | US6305494B1 (de) |
EP (1) | EP0931309B1 (de) |
JP (1) | JP3553614B2 (de) |
KR (1) | KR100381740B1 (de) |
AT (1) | ATE230887T1 (de) |
CZ (1) | CZ294793B6 (de) |
DE (2) | DE29617845U1 (de) |
ES (1) | ES2185987T3 (de) |
HU (1) | HUP0001117A3 (de) |
PL (1) | PL185933B1 (de) |
PT (1) | PT931309E (de) |
WO (1) | WO1998016915A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2345951A (en) * | 1999-01-19 | 2000-07-26 | Draftex Ind Ltd | Sound-absorbing structure |
EP1098294A3 (de) * | 1999-11-02 | 2001-08-16 | CWW-GERKO Akustik GmbH & Co. KG | Schalldämmwand und Verwendungen derselben |
Families Citing this family (34)
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DE29803674U1 (de) * | 1998-03-03 | 1999-07-15 | Faist M Gmbh & Co Kg | Schichtstoff |
DE19838766C1 (de) * | 1998-08-26 | 2000-02-17 | Freudenberg Carl Fa | Schallisolierendes Formteil und dessen Verwendung sowie Verfahren zu seiner Herstellung |
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 |
JP2006519399A (ja) * | 2003-01-07 | 2006-08-24 | キャスケイド エンジニアリング,インク. | モデル化された軽量フォーム音響障壁およびそれの作成方法 |
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 |
WO2004110742A1 (en) * | 2003-06-09 | 2004-12-23 | 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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DE3313001A1 (de) * | 1983-04-12 | 1984-10-18 | Volkswagenwerk Ag, 3180 Wolfsburg | Schallabsorbierende schicht |
EP0439046A1 (de) * | 1990-01-22 | 1991-07-31 | Atd Corporation | Kissenartig geformtes Gebilde mit Wärmeleitzonen und thermischen Isolierzonen und verformbares Laminat |
JPH04168496A (ja) * | 1990-10-31 | 1992-06-16 | Yanmar Diesel Engine Co Ltd | 吸音材 |
GB2261846A (en) * | 1991-11-27 | 1993-06-02 | Salex Acoustic Materials Limit | Acoustic composite material |
EP0557597A1 (de) * | 1991-12-18 | 1993-09-01 | Rex-Patent Graf von Rex KG | Thermisches und akustisches Isolierlaminat |
DE4329411A1 (de) * | 1992-11-10 | 1994-05-11 | Asglawo Gmbh Stoffe Zum Daemme | Wärme- und Schalldämm-Material und Verfahren zu seiner Herstellung |
WO1994026994A1 (en) * | 1993-05-06 | 1994-11-24 | Grumman Aerospace Corporation | Acoustic attenuating liner and method of making same |
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DE2921050A1 (de) * | 1979-05-23 | 1980-11-27 | Fraunhofer Ges Forschung | Schallabsorbierendes bauelement aus kunststoff-folie |
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-
1996
- 1996-10-14 DE DE29617845U patent/DE29617845U1/de not_active Expired - Lifetime
-
1997
- 1997-08-05 PL PL97332825A patent/PL185933B1/pl not_active IP Right Cessation
- 1997-08-05 HU HU0001117A patent/HUP0001117A3/hu unknown
- 1997-08-05 AT AT97938876T patent/ATE230887T1/de not_active IP Right Cessation
- 1997-08-05 EP EP97938876A patent/EP0931309B1/de not_active Expired - Lifetime
- 1997-08-05 CZ CZ19991322A patent/CZ294793B6/cs not_active IP Right Cessation
- 1997-08-05 US US09/284,559 patent/US6305494B1/en not_active Expired - Lifetime
- 1997-08-05 PT PT97938876T patent/PT931309E/pt unknown
- 1997-08-05 KR KR10-1999-7003198A patent/KR100381740B1/ko not_active IP Right Cessation
- 1997-08-05 DE DE59709111T patent/DE59709111D1/de not_active Expired - Lifetime
- 1997-08-05 ES ES97938876T patent/ES2185987T3/es not_active Expired - Lifetime
- 1997-08-05 WO PCT/EP1997/004258 patent/WO1998016915A1/de active IP Right Grant
- 1997-08-05 JP JP51794098A patent/JP3553614B2/ja not_active Expired - Fee Related
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DE3313001A1 (de) * | 1983-04-12 | 1984-10-18 | Volkswagenwerk Ag, 3180 Wolfsburg | Schallabsorbierende schicht |
EP0439046A1 (de) * | 1990-01-22 | 1991-07-31 | Atd Corporation | Kissenartig geformtes Gebilde mit Wärmeleitzonen und thermischen Isolierzonen und verformbares Laminat |
JPH04168496A (ja) * | 1990-10-31 | 1992-06-16 | Yanmar Diesel Engine Co Ltd | 吸音材 |
GB2261846A (en) * | 1991-11-27 | 1993-06-02 | Salex Acoustic Materials Limit | Acoustic composite material |
EP0557597A1 (de) * | 1991-12-18 | 1993-09-01 | Rex-Patent Graf von Rex KG | Thermisches und akustisches Isolierlaminat |
DE4329411A1 (de) * | 1992-11-10 | 1994-05-11 | Asglawo Gmbh Stoffe Zum Daemme | Wärme- und Schalldämm-Material und Verfahren zu seiner Herstellung |
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Title |
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PATENT ABSTRACTS OF JAPAN vol. 016, no. 476 (P - 1430) 5 October 1992 (1992-10-05) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2345951A (en) * | 1999-01-19 | 2000-07-26 | Draftex Ind Ltd | Sound-absorbing structure |
EP1022721A3 (de) * | 1999-01-19 | 2001-05-16 | Draftex Industries Limited | Schallabsorbierenden Strukturen |
EP1098294A3 (de) * | 1999-11-02 | 2001-08-16 | CWW-GERKO Akustik GmbH & Co. KG | Schalldämmwand und Verwendungen derselben |
Also Published As
Publication number | Publication date |
---|---|
DE29617845U1 (de) | 1998-02-12 |
KR20000049116A (ko) | 2000-07-25 |
DE59709111D1 (de) | 2003-02-13 |
EP0931309B1 (de) | 2003-01-08 |
ES2185987T3 (es) | 2003-05-01 |
ATE230887T1 (de) | 2003-01-15 |
HUP0001117A2 (hu) | 2000-08-28 |
EP0931309A1 (de) | 1999-07-28 |
CZ132299A3 (cs) | 1999-11-17 |
JP3553614B2 (ja) | 2004-08-11 |
PL332825A1 (en) | 1999-10-11 |
PT931309E (pt) | 2003-04-30 |
HUP0001117A3 (en) | 2003-01-28 |
KR100381740B1 (ko) | 2003-04-26 |
JP2001507470A (ja) | 2001-06-05 |
US6305494B1 (en) | 2001-10-23 |
PL185933B1 (pl) | 2003-09-30 |
CZ294793B6 (cs) | 2005-03-16 |
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