WO1994024382A1 - Faux plafond - Google Patents

Faux plafond Download PDF

Info

Publication number
WO1994024382A1
WO1994024382A1 PCT/EP1994/001227 EP9401227W WO9424382A1 WO 1994024382 A1 WO1994024382 A1 WO 1994024382A1 EP 9401227 W EP9401227 W EP 9401227W WO 9424382 A1 WO9424382 A1 WO 9424382A1
Authority
WO
WIPO (PCT)
Prior art keywords
ceiling
holes
plates
air
sound
Prior art date
Application number
PCT/EP1994/001227
Other languages
German (de)
English (en)
Inventor
Helmut Fuchs
Dietmar Eckoldt
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
Priority claimed from DE4312885A external-priority patent/DE4312885A1/de
Application filed by Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Priority to JP6522781A priority Critical patent/JPH09502490A/ja
Priority to EP94915072A priority patent/EP0697051B1/fr
Priority to US08/537,674 priority patent/US5740649A/en
Priority to SI9430031T priority patent/SI0697051T1/xx
Priority to DE59401480T priority patent/DE59401480D1/de
Publication of WO1994024382A1 publication Critical patent/WO1994024382A1/fr
Priority to GR960403565T priority patent/GR3022213T3/el

Links

Classifications

    • 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
    • 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
    • E04B1/86—Sound-absorbing elements slab-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
    • E04B1/62—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
    • 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
    • E04B2001/8442—Tray type elements
    • 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
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/8495—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the openings going through from one face to the other face of the element

Definitions

  • the invention relates to a false ceiling according to the preamble of claim 1, as is known from Frick, O. et al "Baukonstrumentsmieslehre", Part 1, Teubner, Stuttgart 1992.
  • Substructures "suspended" from massive, load-bearing floor ceilings are used as preferably light, largely industrially prefabricated, dry and easy to install ceiling systems on a large scale and with a wide range of variants.
  • ceiling cladding and suspended ceilings take on both decorative and constructional functions.
  • the UD Installed as cladding at a certain distance from the solid ceiling, the UD often helps to meet various building physics requirements for the building with regard to thermal insulation, fire protection and sound insulation. However, it is also suitable as a facing for the lighting, room design and room acoustic adaptation of individual rooms to their individual use. After all, larger cavities between the raw ceiling and UD also serve for the hidden laying / integration of pipelines, cable connections, and the inlet and outlet of the various building services systems.
  • Figure 1 shows a conventional reactive absorber according to Frick et al, with a) a plate resonator, b) a Helmholtz resonator and figure c) the degree of absorption.
  • the UD is not only used for decorative and acoustic purposes, but also as a (low-pressure) ventilation ceiling, (radiation) heating ceiling or (surface) cooling ceiling, it should also take on other technical functions at the same time, then the acoustically unavoidable fibrous / porous damping material as a serious disadvantage: It would not only hinder assembly and installation, but also maintenance and operation of the systems. There is therefore an urgent need for UD systems that meet the spatial and building acoustical requirements without the use of porous absorbers and at the same time meet the structural requirements better than conventional acoustic ceilings.
  • the object of the invention is to provide a fiber-free acoustic false ceiling that absorbs broadband.
  • the new UD component presented here on the basis of staggered flat plates as a resonance damper combines properties of the microperforated and membrane absorbers by having a practically closed smooth surface on the room side,
  • the new ceiling tile absorber can be suspended from the solid ceiling in front of or as UD in all under 1. be used as well as be equipped with all the properties and functions specified under 1. and 2. without having the disadvantages mentioned under 4.
  • Fiber-free UD as facing shells (Fig. 10) to increase the airborne and impact sound insulation of the solid ceiling
  • Fiber-free UD as an acoustic ceiling ( Figure 10) for reducing noise and regulating the room acoustics from thin panels 1, the air in the holes in the panels together with the air in the ceiling cavity 11 being damped natural vibrations stimulated by the sound field on the room side, preferably with executes medium and higher frequencies, with plates 1, with uniformly or non-uniformly arranged holes ( ⁇ 2 mm; and perforation area share ⁇ 2%), in which the air together with the air in the ceiling cavity or in the stiffener 2 formed Cavity produces excited, damped vibrations, preferably at medium and high frequencies, through the room-side sound field in the holes,
  • Fiber-free UD as a sound-absorbing boundary of the ceiling cavity as a sound-transmitting channel, which, in the manner of the damping mechanisms described under (b), executes damped vibrations excited and damped by the channel-side sound field in a wide frequency range and thus to reduce the longitudinal transmission to the neighbor space contributes.
  • the UD component made of flat, micro-perforated ceiling panels with high density on the room side enables complete industrial prefabrication.
  • the extremely small holes enable complete privacy, the visual impression of a closed ceiling area and possibilities for decorative loosening of the ceiling.
  • the fiber-free plate components can be used to create almost any shape Train reflectors for lighting, outlets and inlets for ventilation and radiators for heating, without having to forego their acoustic effectiveness.
  • Micro-perforated UD systems can meet the highest purity requirements because they
  • the UD components offer ideal conditions for assembly, disassembly and reassembly and are completely and inexpensively traceable due to their simple, homogeneous construction.
  • the UD components also meet a very current trend in cooling of administrative buildings and assembly facilities in summer: with so-called "Chilled ceilings" made of largely standardized metallic components can save the high fan output, which can easily account for 50% of the operating costs in conventional air conditioning systems. This also helps to reduce CO 2 emissions and eliminates an often very annoying source of drafts, noise pollution and allergies in living and working spaces. With thermal insulation (e.g.
  • the distance between the cooling lamella and insulation, lamella thickness, hole diameter and number of holes per m can be coordinated so that an optimal adaptation to the reverberation time of the Room or to the emission spectrum of the sound sources installed therein.
  • the fiber-free, micro-perforated UD components also offer clear advantages over conventional systems when it comes to heating and ventilation ceilings.
  • UD components can be constructed with one, two or more layers. As a simple facing shell, they can be completely flat and smooth, as well as with decorative patterns and stiffening beads, bends and folds. As a suspended cassette ceiling, the cavities of the cassettes themselves can be designed as ventilation ducts. Your rear wall facing the actual ceiling cavity can advantageously be designed from an acoustic as well as a functional point of view in such a way that Different cavity depths occur side by side to broaden the absorption effect, indentations and formations for receiving components of the house installation are created in the actual ceiling cavity on the underside, in the cassette cavity on the top side by means of moldings and by partition walls supply air, exhaust air and distributor Channels are created.
  • FIGS. 8, 9, 10 is to be explained in relation to the prior art according to FIGS. 1 to 7.
  • Figure 1 shows reactive absorbers.
  • Figure 1 a shows a plate resonator, in which the plate vibrates as a mass in front of the air cushion as a spring, whereby, however, porous material e.g. is required as edge damping in order to achieve a somewhat broadband damping behavior as shown in Figure 1 c.
  • porous material e.g. is required as edge damping in order to achieve a somewhat broadband damping behavior as shown in Figure 1 c.
  • Figure 2 manages to excite a large number of different plate vibrations at different frequencies in a very complex bucket structure in such a way that an overall broadband absorption spectrum at medium frequencies is achieved, even without the use of porous material.
  • 1 5 denotes the cover membrane, 1 6 the porous material with a waterproof cover 17 or mechanical protection 18.
  • Perforated membrane and rear wall are components that can vibrate, i.e. not rigid plates. The membranes are excited to vibrate and thereby extract the energy from the sound.
  • the holes in the hole membrane 14 vary between 3 and 10 mm.
  • 13 represents the walls of the honeycomb Structure, 1 1 is the cavity that is usually filled with air.
  • This membrane absorber can also be manufactured as a module, the membranes 12, 14, 15 and 13 being made of plastic or metal.
  • porous absorbers It is also known to cover large-volume porous absorbers with perforated plates, but the perforated plates are only intended to provide mechanical protection.
  • porous absorbers are e.g. pressed mineral fiber boards, which are placed behind suspended ceilings, these fiber boards often being glued together with a thin aluminum foil for practical reasons or wrapped in plastic foil. Since it is known that the penetration of the sound waves into the passive absorber is largely prevented, the film is made “sound-permeable" by "needling" with a large number of small holes.
  • Figure 6 shows the absorption spectrum from Maa, D.-Y. "Theory and design of microperforated panel sound absorbing constructions". Scientia Sinica 18 (1975), H. 1, 55-71, a micro-perforated plate being arranged in front of a rigid wall. However, this theoretical investigation has never found any technical application.
  • the air in the holes in the false ceiling only transmits the sound vibrations of the sound waves striking the perforated sheets into the damping material located behind them. Only there is the sound energy converted into heat by friction on the fibers or in the pores of the insulating material, thereby reducing the sound energy.
  • the problems of the conventional sound absorbers especially since recent investigations have shown that the sound-absorbing material, for example rock wool or glass wool, is carcinogenic, as well as possible moisture absorption, dust development and abrasion, have the result that new possibilities for sound absorption are sought.
  • the membrane absorbers have been known for a long time, but since they are more expensive than the relatively inexpensive materials made of rock wool or glass wool, they have not been able to establish themselves.
  • the membrane absorbers be it in their cup-shaped configuration or in the earlier construction with jagged surfaces - to broaden the absorption spectrum - are relatively complicated and therefore expensive.
  • the false ceiling according to the invention is simple to manufacture, easy to install and not expensive, since it consists only of the finely perforated perforated plates and the lateral boundary surfaces of the air space and the flat rear wall or plate.
  • the holes with a diameter of preferably 0.4-0.8 mm do not serve as "breakthroughs" for the unimpeded penetration of the sound energy into the air space between the ceiling and ceiling.
  • the extremely small perforation area fraction of a maximum of 5%, preferably only 0.5-3%, for the purpose according to the invention, would be even less suitable for the (passive) transmission of sound energy from the room into the intermediate space than the openings according to the prior art , because these perforated areas have between 1 5 - 50%.
  • the air in the holes of the microperforated perforated sheets according to the invention acts as a very special mass-spring oscillation system, which (reactive) to vibrations in each case due to the sound field impinging on the microperforated perforated sheet frequency range of interest is made stimulable.
  • the tuning to the respective frequency range takes place through a very specific choice of the geometric parameters, in particular the thickness of the perforated plate, the thickness of the air space, the diameter of the holes, the spacing of the holes, the shape of the holes, the proportion of perforation in the total area of the perforated plate and the shape ⁇ the perforated plates.
  • the choice of hole geometry not only determines the frequency range of the absorption, but also the effectiveness of the absorber in this frequency range.
  • the necessary damping is not achieved by attaching additional porous or fibrous "swallowing materials" as shown in Fig. 1 a or Fig. 7, but entirely by friction of the air particles in the narrow holes on their walls.
  • the desired frequency range and the required friction can be optimally adjusted to the respective application, so that an almost complete absorption of the incident sound energy is possible.
  • the plates are so thick and stable that they cannot be excited to vibrate by the impinging sound waves. Without the microperforation of the type according to the invention, the plate, if it were designed to be capable of oscillation, as shown in FIG.
  • Fig. 10a-e shows the false ceiling according to the invention, wherein Fig. 10e shows the false ceiling as a module, which is then installed in a cassette shape under the ceiling as a false ceiling.
  • Fig. 10 denote the flat micro-perforated plate made of sheet metal or hard plastic with holes 4 and 7, a flat oscillatable plate as the rear wall of the module.
  • 3b is the rigid frame of the module and 1 1 the cavities or spaces that are filled with air.
  • 3 are suspensions and 3a e.g. Beams or a substructure for supporting the false ceiling or facing shell. Since the panels or modules are supplied in units of approximately 1 square meter, different distances between the ceiling D and the rear wall can be realized via the suspensions 3 or substructure 3a, thereby broadening the absorption spectrum.
  • 2 are stiffeners of the plates 1, 6, which of course can also be arranged over the entire length and width of the plate so that it does not vibrate.
  • Figure 1 1 shows the spectrum of a microperforated plate made of aluminum with a plate thickness t of 0.1 5 mm, hole diameter 0.16 mm. Hole spacing 1.2 mm and thickness of the air layer in the space between the plate and the rear wall or ceiling of 600 mm and a hole area fraction p of 1.4% given by the hole diameter and distance.
  • a desired resonance frequency fp 54 x 10 ⁇ ⁇ / D • f • K m according to the theory of Maa, where ⁇ hole area / total area, D the air layer thickness in the interspace and K m a constant that is proportional to the hole diameter multipli ⁇ adorned with the root of f, one can then vary the parameters of plate thickness, percentage of hole area or number of holes for a certain hole diameter and air gap D within certain limits.
  • a broadening of the spectrum is also obtained when the plate is slightly curved downwards, for example with a plate width of 1000 mm and a curvature of 60-80 mm.

Landscapes

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

Abstract

Un faux plafond pour bâtiments absorbe les ondes acoustiques et comprend des plaques métalliques perforées. Une ou plusieurs plaques suspendues (1, 6) ont une dureté telle qu'elles ne sont pas susceptibles de vibrer. Le plafond métallique inférieur comprend une pluralité d'orifices (4, 7) agencés régulièrement ou non et dont le diamètre est compris entre 1 et 3 mm, les orifices représentant moins de 4 % de la surface totale. L'air dans les orifices (4, 7) forme avec les cavités (11) situées au-dessus un système d'absorption à masse active du type absorbeur à feuilles.
PCT/EP1994/001227 1993-04-20 1994-04-20 Faux plafond WO1994024382A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP6522781A JPH09502490A (ja) 1993-04-20 1994-04-20 吊り天井
EP94915072A EP0697051B1 (fr) 1993-04-20 1994-04-20 Faux plafond
US08/537,674 US5740649A (en) 1993-04-20 1994-04-20 False ceiling
SI9430031T SI0697051T1 (en) 1993-04-20 1994-04-20 False ceiling
DE59401480T DE59401480D1 (de) 1993-04-20 1994-04-20 Unterdecke
GR960403565T GR3022213T3 (en) 1993-04-20 1997-01-03 False ceiling

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4312885A DE4312885A1 (de) 1993-04-20 1993-04-20 Unterdecke
DEP4312885.8 1993-04-20
DE4312886 1993-04-20

Publications (1)

Publication Number Publication Date
WO1994024382A1 true WO1994024382A1 (fr) 1994-10-27

Family

ID=25925093

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/001227 WO1994024382A1 (fr) 1993-04-20 1994-04-20 Faux plafond

Country Status (1)

Country Link
WO (1) WO1994024382A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742322A1 (fr) * 1995-05-08 1996-11-13 Metzeler Schaum Gmbh Dispositif d'amortissement du son
WO2001012470A1 (fr) * 1999-08-11 2001-02-22 Hp-Chemie Pelzer Research And Development Ltd. Composant presentant un effet absorbant important sur une large gamme de frequences
WO2001071116A1 (fr) 2000-03-20 2001-09-27 Newmat, S.A. Materiaux souples en feuilles pour structures tendues, procede de realisation de tels materiaux, faux plafonds tendus comprenant de tels materiaux
EP1146178A3 (fr) * 2000-04-14 2003-10-22 FAIST Automotive GmbH & Co. KG Elément de construction pour murs, planchers et plafonds à large spectre d'absorbtion sonore
EP1507071A1 (fr) * 2003-08-11 2005-02-16 Zeuna-Stärker Gmbh & Co Kg Silencieux d'échappement
EP1953354A1 (fr) * 2003-08-11 2008-08-06 ArvinMeritor Emissions Technologies GmbH Silencieux d'échappement
EP2374940A2 (fr) 2010-04-06 2011-10-12 Akustik & Raum AG Parois de protection absorbant le bruit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2833487B1 (de) * 1978-07-31 1980-01-10 Armstrong Cork Co Haengedecke mit an aufgehaengten Tragschienen gehaltenen Deckenplatten unter einer Dachkonstruktion
EP0023618A1 (fr) * 1979-07-25 1981-02-11 Wilhelmi Werke GmbH & Co.KG Plaque de construction absorbant les sons et procédé pour sa fabrication
EP0139360A2 (fr) * 1983-08-24 1985-05-02 Keith M. Hankel Dalle métallique absorbant le son, procédé de fabrication et matériaux acoustiques fabriqués à partir de celle-ci
DE9304227U1 (fr) * 1993-03-09 1993-06-17 Gutermuth Sen., Paul, 6456 Langenselbold, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2833487B1 (de) * 1978-07-31 1980-01-10 Armstrong Cork Co Haengedecke mit an aufgehaengten Tragschienen gehaltenen Deckenplatten unter einer Dachkonstruktion
EP0023618A1 (fr) * 1979-07-25 1981-02-11 Wilhelmi Werke GmbH & Co.KG Plaque de construction absorbant les sons et procédé pour sa fabrication
EP0139360A2 (fr) * 1983-08-24 1985-05-02 Keith M. Hankel Dalle métallique absorbant le son, procédé de fabrication et matériaux acoustiques fabriqués à partir de celle-ci
DE9304227U1 (fr) * 1993-03-09 1993-06-17 Gutermuth Sen., Paul, 6456 Langenselbold, De

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742322A1 (fr) * 1995-05-08 1996-11-13 Metzeler Schaum Gmbh Dispositif d'amortissement du son
WO2001012470A1 (fr) * 1999-08-11 2001-02-22 Hp-Chemie Pelzer Research And Development Ltd. Composant presentant un effet absorbant important sur une large gamme de frequences
US6820720B1 (en) 1999-08-11 2004-11-23 Clion Irland Ltd. Sound-absorbing article effective over a broad frequency range
WO2001071116A1 (fr) 2000-03-20 2001-09-27 Newmat, S.A. Materiaux souples en feuilles pour structures tendues, procede de realisation de tels materiaux, faux plafonds tendus comprenant de tels materiaux
EP1146178A3 (fr) * 2000-04-14 2003-10-22 FAIST Automotive GmbH & Co. KG Elément de construction pour murs, planchers et plafonds à large spectre d'absorbtion sonore
EP1507071A1 (fr) * 2003-08-11 2005-02-16 Zeuna-Stärker Gmbh & Co Kg Silencieux d'échappement
EP1953354A1 (fr) * 2003-08-11 2008-08-06 ArvinMeritor Emissions Technologies GmbH Silencieux d'échappement
EP2851526A1 (fr) * 2003-08-11 2015-03-25 EMCON Technologies Germany (Augsburg) GmbH Silencieux d'échappement
EP2851526B1 (fr) 2003-08-11 2018-05-23 Faurecia Emissions Control Technologies, Germany GmbH Silencieux d'échappement
EP2374940A2 (fr) 2010-04-06 2011-10-12 Akustik & Raum AG Parois de protection absorbant le bruit

Similar Documents

Publication Publication Date Title
EP0697051B1 (fr) Faux plafond
US6675551B1 (en) Plate-shaped constructional element and method
DE19861016C2 (de) Strukturierte Formkörper zur Schallabsorption
WO1995025325A1 (fr) Film amortisseur de bruit
EP3455427B1 (fr) Système d'absorption acoustique et pièce insonorisée
WO1994024382A1 (fr) Faux plafond
RU2362855C1 (ru) Шумопоглощающая панель
RU2639213C2 (ru) Многослойная акустическая панель
RU28502U1 (ru) Двустенная панель модульного типа
CN114991329A (zh) 声学干墙板
DE19730355C1 (de) Schallabsorber in Lüftungskanälen
DE10151474A1 (de) Schallabsorber mit streifenförmiger schalldichter Abdeckung
DE102016007248B4 (de) Schallabsorptionsvorrichtung zur Reduzierung von Schalldruckpegeln
JPH10331286A (ja) 複合吸音パネル
JP3045294B1 (ja) 吸音壁
CN210531248U (zh) 一种风机消音器
WO2006077119A1 (fr) Boite d'amortisseur de bruit
DE2437947A1 (de) Anordnung zur absorption von luftschall
DE202013104545U1 (de) Einrichtung zur aktiven und/oder passiven Beeinflussung der Raumakustik
CN217079210U (zh) 一种宽频吸音降噪复合板
JP2934287B2 (ja) 吸音壁
JP3893053B2 (ja) 通気型遮音壁構造
CZ306868B6 (cs) Dvouvrstvý akustický obklad
AT515580B1 (de) Schallabsorber mit tieferem Frequenzbereich
JP3000854B2 (ja) 遮音性能に優れたロックウール成形板

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 94191836.X

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): CN JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1994915072

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1994915072

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1994915072

Country of ref document: EP