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WO1999029979A1 - Materiau insonorisant - Google Patents

Materiau insonorisant Download PDF

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Publication number
WO1999029979A1
WO1999029979A1 PCT/EP1998/007779 EP9807779W WO9929979A1 WO 1999029979 A1 WO1999029979 A1 WO 1999029979A1 EP 9807779 W EP9807779 W EP 9807779W WO 9929979 A1 WO9929979 A1 WO 9929979A1
Authority
WO
WIPO (PCT)
Prior art keywords
foils
sound absorber
plates
room
absorber according
Prior art date
Application number
PCT/EP1998/007779
Other languages
German (de)
English (en)
Inventor
Helmut Fuchs
Xueqin Zha
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Publication of WO1999029979A1 publication Critical patent/WO1999029979A1/fr

Links

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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/8209—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only sound absorbing devices
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/8409—Sound-absorbing elements sheet-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/99—Room acoustics, i.e. forms of, or arrangements in, rooms for influencing or directing sound
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/001—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/34—Grid-like or open-work ceilings, e.g. lattice type box-like modules, acoustic baffles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/34—Grid-like or open-work ceilings, e.g. lattice type box-like modules, acoustic baffles
    • E04B9/36—Grid-like or open-work ceilings, e.g. lattice type box-like modules, acoustic baffles consisting of parallel slats
    • E04B9/366—Grid-like or open-work ceilings, e.g. lattice type box-like modules, acoustic baffles consisting of parallel slats the principal plane of the slats being vertical
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B2001/8263—Mounting of acoustical elements on supporting structure, e.g. framework or wall surface
    • E04B2001/8281—Flat elements mounted parallel to a supporting surface with an acoustically active air gap between the elements and the mounting surface
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B2001/8263—Mounting of acoustical elements on supporting structure, e.g. framework or wall surface
    • E04B2001/829—Flat elements mounted at an angle, e.g. right angle, to the supporting surface
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8433—Tray or frame type panels or blocks, with or without acoustical filling with holes in their face
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8452—Tray or frame type panels or blocks, with or without acoustical filling with peripheral frame members

Definitions

  • the invention relates to a sound absorber with microperforated foils or thin plates made of plastic, such as e.g. is described in detail in DE 4313 885 or 43 15759 or EP 699 257.
  • the damping material can be omitted entirely if the holes in the perforated plates are made very small according to FIGS. 1 (c) and 2 (c) DE 43 12 885 A1, EP81 1 097, DE 43 15 759 C.
  • the air in the holes as a mass and the air "enclosed" in the space behind the perforated plates as a spring together form a mass-spring system, for example in the manner of a so-called Helmholtz resonator.
  • This is a common construction for sound absorbers that are supposed to swallow sound in a medium frequency range.
  • a non-perforated plate can also take on the role of the mass, in the manner of a so-called.
  • Plate resonators according to DE 195 06 51 1 .5 or EP 81 1 097 or foil resonators, WO 95/25325.
  • the plate resonators can be found e.g. as wooden cladding or plasterboard facing for the absorption of low-frequency sound components.
  • Absorbers according to FIGS. 1 (a) and 2 (a) must be carefully covered so that they are sound-permeable, on the one hand to prevent contamination or damage to the porous or fibrous filling and on the other hand to prevent particles from being carried out of the filling into the room.
  • 1 (b) and 2 (b) can be made somewhat abrasion-resistant. But here too there remains the problem of pollution during manufacture and assembly as well as in the exchange of air between the room and the enclosed cavity.
  • the perforated plates according to FIGS. 1 (c) and 2 (c) offer hardly any possibility of deposits in the holes themselves due to the alternating air movement in the small holes, which is resonantly stimulated by sound waves.
  • the microperforated plates or foils can also be built in and out Clean condition easily. However, the fundamental problem remains that through the perforation fine dust and moisture penetrate into the closed cavity and can accumulate there over a long period of time.
  • Fig. 1 (c) is an external component (e.g. a solid wall or a glass roof), there is also a risk that warm and humid air from the room will condense there, causing contamination and mold formation.
  • an external component e.g. a solid wall or a glass roof
  • a sound absorber consisting of only one plate or film "flushed" on both sides by the ambient air would have great advantages.
  • the object of the invention is to create an absorber which is inexpensive to produce and easy to clean and in which no condensation with its disadvantages occurs.
  • Fig. 2 (c) made of layers of microperforated foils, which are e.g. as a so-called Compact absorber tends to hang from a ceiling or a roof, found in the reverberation room that even individual microperforated foils spanned freely in the room according to Fig. 3 sound waves coming from the room on one side, on both sides, vertically, obliquely or grazing, especially at higher frequencies , can absorb very effectively.
  • Fig. 4 shows e.g. in curve 1 the degree of absorption measured in the reverberation room in accordance with DIN EN 20 354 for an arrangement of 5 microperforated transparent polyester films with a thickness of approx. 0.1 mm, holes of approx. 0.2 mm diameter and a hole spacing of
  • micro-perforated films should not actually absorb without an arrangement in front of a reverberant rear wall. According to the previous understanding of the physics of sound absorption, absorption occurs only in the resonator arrangement, where the mass-spring effect comes into play. A physical explanation for the sound absorption of the microperforated foils is - at least at the moment - not possible by the applicant. For these reasons, it is completely surprising that with the sound absorbers according to the invention a significant sound absorption and thus noise reduction is possible.
  • FIG. 6 shows the absorption of the film according to the invention, spanned at a distance of 25 cm (curve 1), in comparison with a densely woven curtain fabric (curve 2) in the same arrangement.
  • the degree of absorption of films according to the invention in a wall-normal arrangement can be increased further either by increasing their width to over 50 cm or by reducing the distance between the parallel stretched films (see FIG. 7).
  • the degree of absorption increases up to a distance of 17.5 cm, even at high frequencies, not above about 0.5, but the new absorbers offer some significant technological advantages for applications, especially in rooms with high demands on hygiene and Transparency of the room and its boundary surfaces.
  • microperforated components according to the invention are manufactured from transparent materials, they offer a variety of new possibilities for the design of the room acoustics and the technical sound insulation. Only if high absorption is also sought at medium and low frequencies, are either very large quantities and depths required or a combination with pronounced deep absorbers is recommended, as is known from conventional practice.
  • the components according to the invention are particularly suitable, particularly in their transparent variants, for subsequent room acoustic improvements.
  • They With their smooth, practically closed surfaces and their lightweight construction, they meet current trends in interior design: They can be imaginatively arranged as acoustic modules in front of glass components, between lights and channels, without destroying the architectural appearance of components with their consciously designed surfaces.
  • Room linings with, for example, mineral wool behind perforated plates according to Fig. 1 (a)
  • the freely stretched, micro-perforated components which are air-circulated on all sides, also do not create any physical problems, because, for example, no potentially harmful temperature gradients are built up in front of external components and internal solid components, e.g. as storage masses for the passive use of solar energy are preserved.
  • the foils, sheets or plates can be arranged anywhere in the room: hanging freely, or more or less stretched in a thin frame, which appears better, parallel to the walls or diagonally in the room, star-shaped or irregular or regularly cassette-shaped, arbitrarily curved.
  • it could be suitable to guide the sound absorber hangers in rails as shown in FIG. 8 in order to be able to move the sound absorbers, e.g. away from the window or to bundle or to be able to influence the sound absorption in the room as desired.
  • a folded arrangement according to Figure 8 can under certain circumstances make the sound absorber cheaper, since longer webs of e.g. Foils can be used.
  • Fig. 1 Room acoustic cladding according to the prior art for walls and ceilings:
  • Fig. 2 Compact absorbers suspended from the ceiling according to the prior art:
  • Fig. 6 Sound absorption level of films according to the invention compared to that of a tightly woven, heavy curtain fabric 1: microperforated film

Landscapes

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

Abstract

L'invention concerne un matériau insonorisant constitué de feuilles microperforées ou de panneaux fins, plusieurs feuilles ou panneaux étant disposés dans une configuration quelconque les uns par rapport aux autres et étant suspendus au plafond d'une pièce ou bien étant suspendus horizontalement ou obliquement dans celle-ci. Une autre forme d'exécution simple consiste en un matériau insonorisant composé d'une feuille microperforée ou d'un panneau fin, qui est suspendu au plafond d'une pièce ou bien est suspendu horizontalement ou obliquement dans celle-ci, et dont la dimension est égale au moins à 15 % de la surface de base de la pièce.
PCT/EP1998/007779 1997-12-05 1998-11-30 Materiau insonorisant WO1999029979A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19754107.0 1997-12-05
DE1997154107 DE19754107C1 (de) 1997-12-05 1997-12-05 Schallabsorber

Publications (1)

Publication Number Publication Date
WO1999029979A1 true WO1999029979A1 (fr) 1999-06-17

Family

ID=7850930

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/007779 WO1999029979A1 (fr) 1997-12-05 1998-11-30 Materiau insonorisant

Country Status (2)

Country Link
DE (1) DE19754107C1 (fr)
WO (1) WO1999029979A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005054616A2 (fr) 2003-12-06 2005-06-16 Cpfilms Inc Stores ignifuges
AT413406B (de) * 2003-08-18 2006-02-15 Holzindustrie Leitinger Ges M Schallabsorbierendes element
US8839590B1 (en) 2012-06-28 2014-09-23 FF Walls, LLC Acoustical grid and method of use
US8999509B2 (en) 2011-04-27 2015-04-07 Cpfilms Inc. Weather resistant exterior film composite
US9303132B2 (en) 2008-01-11 2016-04-05 Cpfilms Inc. Exterior window film
CN107039027A (zh) * 2016-10-28 2017-08-11 陈宏远 音质优化共振器

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DE19839973A1 (de) 1998-09-02 2000-03-23 Fraunhofer Ges Forschung Plattenförmiges Bauelement
ES2211586T3 (es) * 1999-08-11 2004-07-16 HP-CHEMIE PELZER RESEARCH & DEVELOPMENT LTD. Componente con alto efecto de absorcion sobre un amplio intervalo de frecuencia.
DE19939482B4 (de) * 1999-08-20 2007-09-13 Helmut W. Diedrichs Anordnung zur Abschirmung von abgasführenden Teilen von Kraftfahrzeugen
RU2238378C2 (ru) * 2000-03-20 2004-10-20 Ньюмат, С.А. Мягкий листовой материал для натяжных конструкций, способ его изготовления и натяжные фальшпотолки из такого материала
ATE288001T1 (de) * 2000-03-20 2005-02-15 Newmat Sa Flexible polymerfolie für aufgespannte strukturen,verfahren zu deren herstellung und unterdecke mit dieser folie
DE20006946U1 (de) * 2000-04-14 2001-08-16 FAIST Automotive GmbH & Co. KG, 86381 Krumbach Breitbandig schallabsorbierender Bauteil für Wände, Böden und Decken
DE10044761A1 (de) * 2000-09-09 2002-04-18 Hp Chem Pelzer Res & Dev Ltd Bodenbelag mit hoher geräuschmindernder
EP1315638B1 (fr) 2000-09-09 2005-03-30 HP-Chemie Pelzer Research and Development Ltd. Revetement de sol a action insonorisante elevee
DE10151474B4 (de) * 2000-10-18 2006-07-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Schallabsorber mit streifenförmiger schalldichter Abdeckung
DE10051659C1 (de) * 2000-10-18 2002-03-07 Fraunhofer Ges Forschung Schallabsorberanordnung
DE20020044U1 (de) * 2000-11-25 2002-04-18 Bohle Isoliertechnik GmbH, 51645 Gummersbach Schallabsorber
WO2002089110A1 (fr) * 2001-04-27 2002-11-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Silencieux
DE10225072C1 (de) * 2002-06-05 2003-11-06 Carcoustics Tech Ct Gmbh Kraftfahrzeug-Bodenbelag mit getufteter Velours-Teppichschicht und Verfahren zu deren Herstellung
NO322685B1 (no) 2005-03-23 2006-11-27 Deamp As Plateelement
DE102005022807B3 (de) * 2005-05-12 2007-02-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Schall absorbierendes Bauteil und Verwendung
DE102005045702A1 (de) * 2005-09-20 2007-03-22 Strähle, Werner Absorptionsmodul
FR2917045B1 (fr) * 2007-06-11 2009-10-16 Peugeot Citroen Automobiles Sa "element de structure d'un vehicule automobile et son renfort agences pour absorber des bruits"
DE102009004608A1 (de) 2009-01-14 2010-07-15 Musikon Gmbh Räumliches Objekt mit akustischer Wirkung
EP2442972B1 (fr) * 2009-06-15 2012-12-19 Mehler Texnologies GmbH Structures plates textiles dotées de micro-canaux
IT1397308B1 (it) * 2009-11-30 2013-01-04 Vetreria Vicentina S R L Struttura modulare composita per attrezzare superfici preesistenti di ambienti.
DE102010035431A1 (de) 2010-08-26 2012-03-01 Entwicklungsgesellschaft für Akustik (EfA) mit beschränkter Haftung Breitbandiger Schallabsorber
US8439160B2 (en) * 2010-11-09 2013-05-14 California Institute Of Technology Acoustic suppression systems and related methods
DE102011107484A1 (de) 2011-07-08 2013-01-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Schallabsorber für eine Wand oder eine Decke
DE102011078935A1 (de) 2011-07-11 2013-01-17 Bayerische Motoren Werke Aktiengesellschaft Hochabsorptives Schallisolationsbauteil, insbesondere für den Kraftfahrzeuginnenraum
DE102012105321A1 (de) 2012-06-19 2013-12-19 Knauf Gips Kg Schallabsorbierende Platte zur Raumgestaltung sowie zugehöriges Herstellungsverfahren
DE202014103888U1 (de) * 2014-08-21 2015-11-25 Protektorwerk Florenz Maisch Gmbh & Co. Kg Flechtband für Sichtschutzwände oder -zäune
DE202014009761U1 (de) * 2014-12-04 2016-03-07 Haufe Deckensysteme Gmbh Lamelle und Decken- und/oder Wandverkleidung hiermit
US10961700B2 (en) * 2017-02-27 2021-03-30 Knoll, Inc. Noise reduction apparatus and method of making and using the same
DE202019100146U1 (de) 2019-01-11 2019-03-28 Eichhorn Verwaltungs Gmbh Akustikanordnung
US20220148550A1 (en) * 2019-03-04 2022-05-12 Corning Incorporated Micro-perforated panel systems, applications, and methods of making micro-perforated panel systems
US11568847B2 (en) * 2021-02-01 2023-01-31 Jayvic Llc Full frequency acoustic system and method of use

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DE4315759C1 (de) 1993-05-11 1994-05-05 Fraunhofer Ges Forschung Schallabsorbierendes Glas- oder transparentes Kunstglasbauteil
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DE19506511A1 (de) 1995-02-24 1996-08-29 Fraunhofer Ges Forschung Plattenresonator
EP0816583A1 (fr) * 1996-07-03 1998-01-07 KAEFER Isoliertechnik GmbH & Co. KG Dispositif pour diminuer le niveau sonique dans des bâtiments

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DE4315759C1 (de) 1993-05-11 1994-05-05 Fraunhofer Ges Forschung Schallabsorbierendes Glas- oder transparentes Kunstglasbauteil
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WO1995025325A1 (fr) 1994-03-15 1995-09-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Film amortisseur de bruit
DE19506511A1 (de) 1995-02-24 1996-08-29 Fraunhofer Ges Forschung Plattenresonator
EP0811097A1 (fr) 1995-02-24 1997-12-10 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Resonateur a plaques
EP0816583A1 (fr) * 1996-07-03 1998-01-07 KAEFER Isoliertechnik GmbH & Co. KG Dispositif pour diminuer le niveau sonique dans des bâtiments

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Title
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H.V. FUCHS, X. ZHA: "Eisatz mikro-perforierter Platten als Schallabsorber mit inhärenter Dämpfung", ACUSTICA, vol. 81, 1995, pages 107 - 116, XP002097650 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT413406B (de) * 2003-08-18 2006-02-15 Holzindustrie Leitinger Ges M Schallabsorbierendes element
WO2005054616A2 (fr) 2003-12-06 2005-06-16 Cpfilms Inc Stores ignifuges
US8617715B2 (en) 2003-12-06 2013-12-31 Cpfilms Inc. Fire retardant shades
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