WO1994024382A1 - Unterdecke - Google Patents
Unterdecke Download PDFInfo
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 239000004033 plastic Substances 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 239000003351 stiffener Substances 0.000 claims description 3
- 238000007665 sagging Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000006096 absorbing agent Substances 0.000 abstract description 28
- 239000011888 foil Substances 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 description 18
- 239000012528 membrane Substances 0.000 description 18
- 238000013016 damping Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 10
- 239000011148 porous material Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 238000000862 absorption spectrum Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000002557 mineral fiber Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000007815 allergy Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009747 swallowing Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI9430031T SI0697051T1 (en) | 1993-04-20 | 1994-04-20 | False ceiling |
DE59401480T DE59401480D1 (de) | 1993-04-20 | 1994-04-20 | Unterdecke |
JP6522781A JPH09502490A (ja) | 1993-04-20 | 1994-04-20 | 吊り天井 |
US08/537,674 US5740649A (en) | 1993-04-20 | 1994-04-20 | False ceiling |
EP94915072A EP0697051B1 (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 |
---|---|---|---|
DEP4312885.8 | 1993-04-20 | ||
DE4312885A DE4312885A1 (de) | 1993-04-20 | 1993-04-20 | Unterdecke |
DE4312886 | 1993-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994024382A1 true WO1994024382A1 (de) | 1994-10-27 |
Family
ID=25925093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1994/001227 WO1994024382A1 (de) | 1993-04-20 | 1994-04-20 | Unterdecke |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1994024382A1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0742322A1 (de) * | 1995-05-08 | 1996-11-13 | Metzeler Schaum Gmbh | Schalldämpfungsvorrichtung |
WO2001012470A1 (de) * | 1999-08-11 | 2001-02-22 | Hp-Chemie Pelzer Research And Development Ltd. | Bauteil mit hoher absorptiver wirkung über einem breiten frequenzbereich |
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 (de) * | 2000-04-14 | 2003-10-22 | FAIST Automotive GmbH & Co. KG | Breitbandig schallabsorbierender Bauteil für Wände, Böden und Decken |
EP1507071A1 (de) * | 2003-08-11 | 2005-02-16 | Zeuna-Stärker Gmbh & Co Kg | Abgasschalldämpfer |
EP1953354A1 (de) * | 2003-08-11 | 2008-08-06 | ArvinMeritor Emissions Technologies GmbH | Abgasschalldämpfer |
EP2374940A2 (de) | 2010-04-06 | 2011-10-12 | Akustik & Raum AG | Absorbierende Lärmschutzwände |
Citations (4)
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 (de) * | 1979-07-25 | 1981-02-11 | Wilhelmi Werke GmbH & Co.KG | Schallschluckende Bauplatte und Verfahren zu ihrer Herstellung |
EP0139360A2 (de) * | 1983-08-24 | 1985-05-02 | Keith M. Hankel | Schallschluckende Metallplatte, Verfahren zu ihrer Herstellung und daraus gefertigte akustische Materialien |
DE9304227U1 (de) * | 1993-03-09 | 1993-06-17 | Gutermuth Sen., Paul, 6456 Langenselbold, De |
-
1994
- 1994-04-20 WO PCT/EP1994/001227 patent/WO1994024382A1/de active IP Right Grant
Patent Citations (4)
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 (de) * | 1979-07-25 | 1981-02-11 | Wilhelmi Werke GmbH & Co.KG | Schallschluckende Bauplatte und Verfahren zu ihrer Herstellung |
EP0139360A2 (de) * | 1983-08-24 | 1985-05-02 | Keith M. Hankel | Schallschluckende Metallplatte, Verfahren zu ihrer Herstellung und daraus gefertigte akustische Materialien |
DE9304227U1 (de) * | 1993-03-09 | 1993-06-17 | Gutermuth Sen., Paul, 6456 Langenselbold, De |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0742322A1 (de) * | 1995-05-08 | 1996-11-13 | Metzeler Schaum Gmbh | Schalldämpfungsvorrichtung |
WO2001012470A1 (de) * | 1999-08-11 | 2001-02-22 | Hp-Chemie Pelzer Research And Development Ltd. | Bauteil mit hoher absorptiver wirkung über einem breiten frequenzbereich |
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 (de) * | 2000-04-14 | 2003-10-22 | FAIST Automotive GmbH & Co. KG | Breitbandig schallabsorbierender Bauteil für Wände, Böden und Decken |
EP1507071A1 (de) * | 2003-08-11 | 2005-02-16 | Zeuna-Stärker Gmbh & Co Kg | Abgasschalldämpfer |
EP1953354A1 (de) * | 2003-08-11 | 2008-08-06 | ArvinMeritor Emissions Technologies GmbH | Abgasschalldämpfer |
EP2851526A1 (de) * | 2003-08-11 | 2015-03-25 | EMCON Technologies Germany (Augsburg) GmbH | Abgasschalldämpfer |
EP2851526B1 (de) | 2003-08-11 | 2018-05-23 | Faurecia Emissions Control Technologies, Germany GmbH | Abgasschalldämpfer |
EP2374940A2 (de) | 2010-04-06 | 2011-10-12 | Akustik & Raum AG | Absorbierende Lärmschutzwände |
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