DE8804962U1 - Composite panel for sound-absorbing wall and ceiling cladding - Google Patents

Composite panel for sound-absorbing wall and ceiling cladding

Info

Publication number
DE8804962U1
DE8804962U1 DE8804962U DE8804962U DE8804962U1 DE 8804962 U1 DE8804962 U1 DE 8804962U1 DE 8804962 U DE8804962 U DE 8804962U DE 8804962 U DE8804962 U DE 8804962U DE 8804962 U1 DE8804962 U1 DE 8804962U1
Authority
DE
Germany
Prior art keywords
composite panel
air
sound
igr
air chambers
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
Application number
DE8804962U
Other languages
German (de)
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.)
Knauf Gips KG
Original Assignee
Gebr Knauf Westdeutsche Gipswerke
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 Gebr Knauf Westdeutsche Gipswerke filed Critical Gebr Knauf Westdeutsche Gipswerke
Priority to DE8804962U priority Critical patent/DE8804962U1/en
Publication of DE8804962U1 publication Critical patent/DE8804962U1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/0867—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements having acoustic absorption means on the visible surface
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels
    • B32B2607/02—Wall papers, wall coverings

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Architecture (AREA)
  • Multimedia (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Description

111! »I» ·· »·111! »I» ·· »·

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AnmeLderin: Firma Gebr. Knauf Westdeutsche GipswerkeApplicant: Gebr. Knauf Westdeutsche Gipswerke

TiteL: Verbundplatte für scha Llabsorbierende Wand- und
Deckenbek LeidungTitle: Composite panel for sound-absorbing wall and
Deckenbek Leidung

GebrauchsmusterUtility model

Die Neuerung betrifft eine Verbundplatte für schaLlabsorbierende _ Wand- und OeckenbekLei dung, bei der eine mit KopplungsöffnungenThe innovation concerns a composite panel for sound-absorbing _ wall and corner cladding, in which a

b \) versehene Lochplatte auf einer Sichtseite mit einer Sichtseitenbeschichtung volLflächig abgedeckt ist, die Luftdurchlässig und schalltransparent gestaltet ist, bei der eine Rückseite vollflä-b \) perforated plate is fully covered on one visible side with a visible side coating which is air-permeable and sound-transparent, with one back side fully

,. chig von einer luftundurchlässigen angeklebten Kunststcf f-Fo L i e ' abgedeckt ist, und die zur Begrenzung eines He ImhoLtzresonator-LufthohIraumes vorgesehen ist. ,. is completely covered by an air-impermeable glued plastic film and is intended to delimit a He Imholtz resonator air cavity.

Eine soLche Verbundplatte ohne Kunststoff-Folie an der Rückseite ist durch die DE-OS 36 43 481 bekannt. Bei dieser Verbundplatte strö-it Luft durch die luftdurchlässige Si cht sei tenabdeckung und die an der Rückseite nicht abgedeckten Kopplungsöffnungen. Dadurch treten an der Sichtseitenabdeckung Verschmutzungen auf, die f\ in den Konturen den Kopplungsöffnungen entsprechen. Wenr, die Rückseite mit einer einfachen, einschichtigen luftundurchlässigen Kunststoff-Folie, die straff gespannt ist, beklebt wird, so sind die Luf tdur-jh lässi gkei t und die Verschmutzungen verhindert und wird die an sich gewünschte Scha L labsorpt i or: erheblich beeinträchtigt. Such a composite panel without a plastic film on the back is known from DE-OS 36 43 481. With this composite panel, air flows through the air-permeable visible side cover and the coupling openings that are not covered on the back. This causes dirt to appear on the visible side cover, the contours of which correspond to the coupling openings. If the back is covered with a simple, single-layer, air-impermeable plastic film that is stretched tightly, the air permeability and dirt are prevented and the desired sound absorption is significantly impaired.

Eine Aufgabe der Neuerung ist es daher, eine Verbundplatte der eingangs genannten Art zu schaffen, bei der die Schallabsorption trotz der Kunststoff-Folie verbessert ist. Die neuerungsgemäß &Igr; Verbundplatte ist, diese Aufgabe lösend, dadurch gekennzeichnet, if daß die Kunststoff-Folie der Rückseite eine Zwei schi chfFol i e ist, die über ihre Fläche verteilt von den beiden Schichten begrenz &idiagr; s L&udigr;&idiagr;Lkammern bildet =One of the aims of the innovation is therefore to create a composite panel of the type mentioned at the beginning, in which the sound absorption is improved despite the plastic film. The composite panel according to the innovation is, in order to solve this problem, characterized in that the plastic film on the back is a two-layer film, which forms sound chambers delimited by the two layers distributed over its surface.

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« «I Il Il« «I I I

titi t * I IIt * I II

• I I I I I• I I I I I

itit Il ItIl It

In den Luftkammern sind Luftvolumina eingeschlossen, die der Op" timierung der Anpassung des Strömungswiderstahdes beim Helmholtzresonator dienen und ein breiteres Dämpfungsbänd erzeuge &eegr; ä Es läßt sich durch S cha I labsörptiönsmessUngen feststellen, daß sich je nach Dimensionierung döF Luftvolumina bzw. Luftkammern für die Verbundplatte hohe Schallabsorptionswerte erreichen lassen. Die Schallabsorption kann im Frequenzverlauf je nach den bestehenden Anforderungen angepaßt werden. Trotz Luftundurchlässigkeit ist eine befriedigende Schallabsorption gegeben. Der durch die Kopplungsöffnungen hindurchtretende Schall passiert die Zweischicht-Folie weitgehend im Bereich der Luftkammern.Air volumes are enclosed in the air chambers, which serve to optimize the adjustment of the flow resistance in the Helmholtz resonator and create a wider damping band . It can be determined through sound absorption measurements that, depending on the dimensioning of the air volumes or air chambers for the composite panel, high sound absorption values can be achieved. The sound absorption can be adjusted in the frequency curve depending on the existing requirements. Despite the airtightness, satisfactory sound absorption is provided. The sound passing through the coupling openings passes through the two-layer film largely in the area of the air chambers.

Es ist denkbar, die Luftkammern durch Ausbauchungen beider Schichten der Zwei schi cht^Foli e zu bilden. Besonders zweckmäßig und vorteilhaft ist es jedoch, wenn nur die eine Schicht der Zweischicht-Folie die Luftkammern begrenzende Ausbauchungen bildet und die andere Schicht flach gestaltet sowie an die Lochplatte geklebt ist. Dies vereinfacht die Herstellung der Verbundplatte und verbessert die Schallabsorption.It is conceivable to form the air chambers by bulging both layers of the two-layer film. However, it is particularly practical and advantageous if only one layer of the two-layer film forms bulges that delimit the air chambers and the other layer is flat and glued to the perforated plate. This simplifies the manufacture of the composite plate and improves sound absorption.

Zwischen den Luftkammern bildet die Zwei schicht-FoIie Bereiche, an denen die beiden Schichten zusammengeklebt sind, die nicht zur Schallabsorption beitragen und die deshalb möglichst klein gehalten werden. Besonders zweckmäßig und vorteilhaft ist es, wenn mindestens 70 % der Fläche der Zweischicht-Folie mit Luftkammern besetzt ist. Dieses Verhältnis von Luftkammern-Fläche zu Klebebereichs-F lache ergibt noch einen befriedigenden Schallabsorptionsgrad.Between the air chambers, the two-layer film forms areas where the two layers are glued together, which do not contribute to sound absorption and are therefore kept as small as possible. It is particularly useful and advantageous if at least 70% of the surface of the two-layer film is occupied by air chambers. This ratio of air chamber area to adhesive area still results in a satisfactory level of sound absorption.

Für die erwünschte Wirkung der neuerungsciimäßen Verbundplatte ist es nicht unbedingt nötig, daß die von den Kopplungsöffnungen an der Rückseite gebildete Fläche insgesamt von Luftkammern abgedeckt ist. Besonders zweckmäßig und vorteilhaft ist es jedoch, wenn mindestens 80 % der von den Kopplungsöffnungen an der Rückseite gebildeten Fläche von Luftkammerr, abgedeckt ist. Hierbei lassen sich möglichst große Luftkenmern bei befriedigender Schallabsorption und genügender Stabilität der Zweischicht-Folie gestaIten.For the desired effect of the composite panel according to the innovation, it is not absolutely necessary that the area formed by the coupling openings on the back is completely covered by air chambers. However, it is particularly useful and advantageous if at least 80% of the area formed by the coupling openings on the back is covered by air chambers. This allows the largest possible air chambers to be created with satisfactory sound absorption and sufficient stability of the two-layer film.

«lit it i I <«lit it i I <

itc iitc i

Die verwendeten Folien-Schichten sind so dünn Und flexibel./ daß si? mit dem durch die KopplUngsöf f riungeil hi ndurcht retenden S c h ä L L mitschwingen- Beide Folien-Schichten sind z.B. gleich dick Und sind z.B. 10 - 30 m di ck.The foil layers used are so thin and flexible that they resonate with the sound passing through the coupling opening. Both foil layers are the same thickness and are e.g. 10 - 30 m thick.

In der Zeichnung ist eine bevorzugte Ausführungsform der Neuerung dargestellt und zeigtThe drawing shows a preferred embodiment of the innovation and shows

Fig» 1 einen Schnitt gemäß Linie i-I in Fig. 2 einer Verbundplatte für schal'(.absorbierende wand- und öeckenbekleiüüng und Fig. 2 einen Schnitt gemäß Linie II-II in Fig. 1.Fig. 1 shows a section along line I-I in Fig. 2 of a composite panel for sound-absorbing wall and corner cladding and Fig. 2 shows a section along line II-II in Fig. 1.

\J Die Verbundplatte gemäß Zeichnung ist an einer Wand 1 öder Decke über Abstandshalter 2, eine Unterkonstruktion oder eine Abhängekonstruktion befestigt und zwischen der Verbundplatte und der Wand 1 sind Lufthohlräume 3 vorhanden. Die Verbundplatte umfaßt Vine Lochplatte 4, die aus Metall, Kunststoff oder in der Regel aus Gips besteht* Die Lochplatte 4 ist mit durchgehenden Kopplungsöffnungen 5 versehen, die in an sich bekannter V/eise geformt und verteilt sind. Die Sichtseite der Lochplatte 4 ist mit einer Sichtseitenbeschichtung 6 belegt, die z.B. aus Vlies> Filz oder Gewebe oder Kombinationen davon besteht. Diese Beschichtungen können mit offenporigen, scha I Itranspartenten Anstrichen oder Spritzüberzügen optisch behandelt werden. An der Rückseite der Lochplatte 4 ist eine Zwei schi cht-Fol i e 7 vorgesehen, deren eine Schicht 8 pLan ist und an der Lochplatte anliegt und deren andere Schicht 9 mit Ausbauchungen versehen ist, so daß Luftkammern 10 gebildet sind. Die beiden Folien-Schichten 8, 9 sind in Bereichen 11 miteinander verklebt. \J The composite panel according to the drawing is fastened to a wall 1 or ceiling via spacers 2, a substructure or a suspension structure and air cavities 3 are present between the composite panel and the wall 1. The composite panel comprises a perforated panel 4 which is made of metal, plastic or usually plaster. The perforated panel 4 is provided with continuous coupling openings 5 which are shaped and distributed in a manner known per se. The visible side of the perforated panel 4 is covered with a visible side coating 6 which consists, for example, of fleece, felt or fabric or combinations thereof. These coatings can be optically treated with open-pored, transparent paints or spray coatings. A two-layer film 7 is provided on the back of the perforated panel 4, one layer 8 of which is flat and lies against the perforated panel and the other layer 9 of which is provided with bulges so that air chambers 10 are formed. The two film layers 8, 9 are glued together in areas 11.

Claims (4)

SchutzansprücheProtection claims 1. Verbundplatte für schaLLabsorbierende Wand- und DeckenbekLeidung, bei der eine mit KoppLungsöffnungen versehene Lochplatte auf einer Sichtseite mit einer Sichtseitenbeschichtung vcLL-flächig abgedeckt ist, die LuftdurchLässig und scha LLtransparent gestaltet ist, bei der eine Rückseite voLLflächig von einer Luftundurchlässigen angeklebten Kunststoff-Folie abgedeckt ist und die zur Begrenzung einer HeimhoLtzresonator-Lufthohlraumes vorgesehen ist, dadurch gekennzeichnet, daß die Kunststoff-Folie an der Rückseite eine Zweischicht-FoLie (7) ist, die über ihre Fläche verteilt von den beiden Schichten (8, 9) begrenzte Luftkammern (10) biLdet.1. Composite panel for sound-absorbing wall and ceiling cladding, in which a perforated panel provided with coupling openings is covered on one visible side with a visible side coating which is designed to be air-permeable and sound-transparent, in which a rear side is completely covered by an air-impermeable glued-on plastic film and which is intended to delimit a Heimholz resonator air cavity, characterized in that the plastic film on the rear side is a two-layer film (7) which forms air chambers (10) distributed over its surface by the two layers (8, 9). 2. Verbundplatte nach Anspruch 1, dadurch gekennzeichnet, daß nur die eine Schicht (9) der Zweischicht-FoIie (7) die Luftkammern (10) begrenzende Ausbauchungen bildet und die andere Schicht (8) fl^eh gestaltet sowie an die Lochplatte (4) geklebt ist.2. Composite panel according to claim 1, characterized in that only one layer (9) of the two-layer film (7) forms bulges delimiting the air chambers (10) and the other layer (8) is flat and is glued to the perforated plate (4). 3. Verbundplatte nar-b Anspruch 1 oder 2, dadurch gekennzeichnet, daß mindestens 70 % der Fläche der Zweischicht-FoLie (7) mit Luftkammern (10) besetzt ist.3. Composite panel nar-b according to claim 1 or 2, characterized in that at least 70% of the surface of the two-layer film (7) is occupied by air chambers (10). 4. Verbundplatte nach Anspruch 1, 2 oder 3, dadurch gekennzeich net, daß mindestens 80 % der von den Kopplungsöffnungen (5) an der Rückseite gebildeten FLäche von Luftkammern (10) abgedeckt4. Composite panel according to claim 1, 2 or 3, characterized in that at least 80% of the surface formed by the coupling openings (5) on the rear side is covered by air chambers (10). ^ ist.^ is. ff M I) t · * * ' .Mff M I) t · * * ' .M i I I I I I I lit Il i IIIIII lit Il I &igr; III itii i t &igr; I I i If ft IfMt ItIf f *I &igr; III itii it &igr; II i If ft IfMt ItIf f * I1 &igr;f &igr;» &igr; ti ** I1 &igr;f &igr;» &igr; ti ** *···*···
DE8804962U 1988-04-15 1988-04-15 Composite panel for sound-absorbing wall and ceiling cladding Expired DE8804962U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8804962U DE8804962U1 (en) 1988-04-15 1988-04-15 Composite panel for sound-absorbing wall and ceiling cladding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8804962U DE8804962U1 (en) 1988-04-15 1988-04-15 Composite panel for sound-absorbing wall and ceiling cladding

Publications (1)

Publication Number Publication Date
DE8804962U1 true DE8804962U1 (en) 1988-05-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
DE (1) DE8804962U1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0605784A1 (en) * 1993-01-08 1994-07-13 Wilhelmi Werke GmbH &amp; Co. KG Acoustic panel
EP0622177A1 (en) * 1993-04-28 1994-11-02 GEORG NÄHER GmbH Moulded multilayered product, in particular an internal liner for vehicles, and method for its production
WO2004060657A2 (en) * 2003-01-02 2004-07-22 3M Innovative Properties Company Acoustic web
WO2010105655A1 (en) * 2009-03-16 2010-09-23 Knauf Gips Kg Sound-absorbing construction board
DE102013225868A1 (en) * 2013-12-13 2015-06-18 Bayerische Motoren Werke Aktiengesellschaft Motor vehicle with a roller blind

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1868072U (en) * 1960-12-21 1963-02-28 Ver Baustoffwerke Bodenwerder SOUND-SOUND DISK.
DE1756499A1 (en) * 1968-05-30 1970-04-09 Bede James R Airplane wing
DE2758041A1 (en) * 1977-12-24 1979-06-28 Fraunhofer Ges Forschung Sound-damping laminate used as wall-covering - made of polyethylene sheet with noise-absorbing depressions sealed by smooth covering polystyrene foil
DE3233654C2 (en) * 1982-09-10 1986-01-16 Ewald Dörken AG, 5804 Herdecke Sound-absorbing component
DE8705270U1 (de) * 1987-04-09 1987-07-02 Stotmeister GmbH, 7894 Stühlingen Schallabsorbierende Vorsatzschale für Decken und Wände

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1868072U (en) * 1960-12-21 1963-02-28 Ver Baustoffwerke Bodenwerder SOUND-SOUND DISK.
DE1756499A1 (en) * 1968-05-30 1970-04-09 Bede James R Airplane wing
DE2758041A1 (en) * 1977-12-24 1979-06-28 Fraunhofer Ges Forschung Sound-damping laminate used as wall-covering - made of polyethylene sheet with noise-absorbing depressions sealed by smooth covering polystyrene foil
DE3233654C2 (en) * 1982-09-10 1986-01-16 Ewald Dörken AG, 5804 Herdecke Sound-absorbing component
DE8705270U1 (de) * 1987-04-09 1987-07-02 Stotmeister GmbH, 7894 Stühlingen Schallabsorbierende Vorsatzschale für Decken und Wände

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0605784A1 (en) * 1993-01-08 1994-07-13 Wilhelmi Werke GmbH &amp; Co. KG Acoustic panel
EP0622177A1 (en) * 1993-04-28 1994-11-02 GEORG NÄHER GmbH Moulded multilayered product, in particular an internal liner for vehicles, and method for its production
WO2004060657A2 (en) * 2003-01-02 2004-07-22 3M Innovative Properties Company Acoustic web
WO2004060657A3 (en) * 2003-01-02 2004-09-02 3M Innovative Properties Co Acoustic web
WO2010105655A1 (en) * 2009-03-16 2010-09-23 Knauf Gips Kg Sound-absorbing construction board
DE102013225868A1 (en) * 2013-12-13 2015-06-18 Bayerische Motoren Werke Aktiengesellschaft Motor vehicle with a roller blind

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