EP2314783A1 - Absorbeur de bruits ambiants - Google Patents

Absorbeur de bruits ambiants Download PDF

Info

Publication number
EP2314783A1
EP2314783A1 EP09013256A EP09013256A EP2314783A1 EP 2314783 A1 EP2314783 A1 EP 2314783A1 EP 09013256 A EP09013256 A EP 09013256A EP 09013256 A EP09013256 A EP 09013256A EP 2314783 A1 EP2314783 A1 EP 2314783A1
Authority
EP
European Patent Office
Prior art keywords
sound
sound absorber
absorber according
space sound
space
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.)
Withdrawn
Application number
EP09013256A
Other languages
German (de)
English (en)
Inventor
Thorsten Flörsheimer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP09013256A priority Critical patent/EP2314783A1/fr
Priority to PCT/EP2010/006310 priority patent/WO2011047806A2/fr
Publication of EP2314783A1 publication Critical patent/EP2314783A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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 room sound absorber for positioning in front of a reverberant sound reflection surface of a building or a furnishing object, with a sound-insulating board made of a porous hard or soft foam for the absorption of sound waves.
  • the room sound absorber is preferably provided for soundproofing in rooms. Sound attenuation in this context means a hindrance of sound propagation through the absorption of airborne noise.
  • passive noise protection devices are generally used.
  • the sound energy impinging on the noise protection device is partially reflected there, partially transmitted and partly dissipated, i. converted into heat.
  • the sum of transmitted and dissipated portion corresponds to the sound energy absorbed by the noise reduction device.
  • Absorbers are devices which have an open-pore surface on the outside and a kind of cell structure on the inside.
  • the effect of porous absorbers is based on the fact that the incident sound waves penetrate into the pores and channels of the absorber and cause the air to vibrate in the pores. Friction and flow resistance in the pores leads to a transformation of the sound energy into heat.
  • a plate resonator is a flexible plate or tensioned foil, which is arranged at a distance, for example, in front of a reverberant wall.
  • a plate resonator is a selective spring-mass system, which is excited by the impinging sound waves to vibrate. The effect of the plate resonator is narrow-band and is based on the fact that increased internal losses occur during oscillation.
  • a Helmholtz resonator is a plate resonator in which the plate or foil is perforated. It is, like the plate resonator, a selective spring-mass system. The air plug in the holes is stimulated by the incident sound waves to resonate. The air volume behind it acts as a spring in the spring-mass system. As with the plate resonator, the effect of the Helmholtz resonator is greatest in the case of resonance.
  • the DE 20 2004 009 370 U1 discloses a disc-shaped modular sound absorber consisting of a surrounding frame and sound-absorbing elements built into the frame and comprising a front panel or front panel on a flat side of the sound absorber.
  • porous absorber materials in sheet form are predominantly used, for example glass wool, mineral wool or open-cell foams.
  • Already thin plates lead to a high absorption of the incident sound waves, provided that the plate thickness corresponds to about one eighth to one quarter of the wavelength of the sound waves.
  • Such absorber plates are broadband, wherein the effective absorption at a certain thickness of the absorber plate is dependent on the frequency of the incident sound waves.
  • a high absorbed sound energy is achieved at a frequency of the sound waves of 2000 Hz already with a typical plate thickness of two to four centimeters.
  • the sound absorption with homogeneous porous absorbers is dependent on correspondingly thick plates for low frequencies.
  • a plate thickness of between 20 and 40 centimeters is needed, for which in practice the spatial depth of the frame is unsuitable.
  • the DE 40 27 511 C1 proposed to provide a hybrid sound absorber, which in addition to a conventional, passive absorber comprises an electronic system with which the sound can be attenuated. So it is operated a technically high cost, which also requires a power supply.
  • the invention has for its object to propose a broadband room sound absorber, which effectively attenuates sound waves in the frequency range between about 200 and 5000 Hz at low depth.
  • the room sound absorber should be economically producible and universally applicable.
  • the space sound absorber according to the invention has a soundproof insulating panel made of a porous hard or soft foam and another on a flat side of the insulation board adjacent Schalldämpf Symposium for the absorption of sound waves.
  • the Schalldämpf College has opposite the insulation board on a different sound propagation speed, a different density and / or a different resistance for sound waves (impedance). It can effectively absorb sound waves that are hardly attenuated by the insulation board due to the frequency and / or attenuate sound waves that are also absorbed by the insulation board, even before the insulation board.
  • the combination of sound-absorbing Insulation plate with the Schalldämpf Symposium increases the frequency range in which the room sound absorber absorbs sound.
  • the proposed room sound absorber with the sound insulation board and the adjoining Schalldämpf Berlin is provided for positioning in front of a reverberant sound reflection surface of a building or a furnishing.
  • reverberant is called an object with a high impedance, which absorbs little sound energy, with soft sound an object with a low impedance, which absorbs a lot of sound energy.
  • Impedance summarizes all resistances which counteract the propagation of vibrations on or in such an object.
  • the room sound absorber is usually used in rooms in which due to the furnishings provided there and the other room equipment only a small sound absorption occurs. This is the case, for example, in rooms in which no carpets or curtains are provided and which are therefore characterized essentially by reverberant smooth surfaces of the floor, the ceiling or the walls and the furnishings.
  • One or more such room sound absorbers which may be formed in a visually appealing manner, can be installed or installed in wall areas, ceiling areas or freely in the room. In rooms with one or more reverberant sound reflecting surfaces, they keep a noise level at a low or at least acceptable level by absorbing a considerable part of the sound waves that occur and thus reducing the noise pollution.
  • the silencing area is formed by a softboard having a typical thickness of about 3 mm.
  • the softboard is usually a soft, especially soft sound, usually slightly porous material plate made of different binders, such as plastic or natural resin or glue bonded fibers.
  • fibers for example, vegetable fibers or synthetic fibers can be used.
  • a Softboard used, which is made of or with wood fibers. Such softboard are called Holzfaserdämmplatten and occasionally referred to as soft wood fiber boards or softwood fiber boards. It has proven to be advantageous if the softboard is applied over the entire surface of the insulation board.
  • the sound energy of sound waves that act on the insulation board on the side facing away from the sound reflection surface flat side are transmitted from the insulation board directly to the softboard.
  • the softboard is thus excited to vibrate. It acts as a deep filter for sound frequencies of 60 Hz and below.
  • the insulation board is preferably foamed from a polyurethane material. It may have open and / or closed pores or cells, be hard or soft and also be provided with a coating. It attenuates sound waves with a frequency from about 60 to 250 Hz low and absorbs the sound energy of sound waves with a frequency of about 250 Hz to 5000 Hz almost completely.
  • the Schalldämpf Scheme is formed by a gas cushion, for example, has a film as a boundary, which is arranged at a distance from the insulation board.
  • the gas cushion is advantageously arranged on a side remote from the sound reflection surface flat side of the insulation board.
  • the space sound absorber according to the invention in addition to the insulation board of a porous hard or soft foam, which forms a Schalldämpf Anlagen the Jardinschallabsorbers, the gas cushion or the softboard alone as further Schalldämpf Episode or the gas cushion and the softboard on different flat sides of the insulation board as two more the insulation board adjacent Schalldämpf Symposiume.
  • the gas cushion limiting film is thin and taut. It is preferably closed, so that the sound waves can not propagate unhindered through the film.
  • the film enhances the absorption of sound waves by the room sound absorber in a frequency range below about 200 Hz significantly up to about 8%.
  • the enclosed between the insulation board and the film air cushion forms a film absorber.
  • He is a mass-spring system with low depth, which acts like a plate resonator.
  • the foil forms the mass, which has a high moment of inertia due to its tension, and the air cushion the spring.
  • the effect of a film absorber is narrow band, i. it absorbs in the immediate vicinity of a resonant frequency.
  • the resonant frequency depends essentially on the size, the thickness, the sound transmission and the type of Wandeinposition (rigid or mobile) of the film.
  • the insulation board and / or the Schalldämpf Geb is received in a reverberant frame.
  • the frame should be designed as rigid as possible and thus be able to oscillate only conditionally.
  • the frame for example, plastic, metal or a similar solid material can be used.
  • the frame is solid wood.
  • the frame is designed to accommodate one or more different types of muffling areas.
  • the insulation board and the adjacent thereto Schalldämpf Quarry on a cover of an acoustic fleece instead of the fleece, a fabric may be provided.
  • the acoustic fleece is thin, due to its sound permeability and covers the insulation board or the sound damping area over its entire surface. It is preferably clamped to the frame and can overlap it on an outside in whole or in part.
  • an acoustic fleece be provided on the back and / or on the circumference of the room sound absorber.
  • a spacer assembly of the room sound absorber for example, in front of a wall or under a ceiling absorbs an acoustic fleece on the back of the room sound absorber the sound effectively.
  • the acoustic fleece is arranged at a distance from the insulating panel and / or the at least one Schalldämpf Suite and includes an air layer between it and the insulating panel or the Schalldämpf Suite.
  • the acoustic fleece forms with the air layer another Schalldämpf Suite which acts like a plate or film absorber.
  • the sound-absorbing Schalldämpf Bachelor thus formed absorbed in the medium to high frequency range from about 300 to 400 Hz up to about 4000 Hz.
  • the frame of the space sound absorber according to the invention may have on one of the sound reflection surface associated rear spacers that prevent the room sound absorber rests when mounted on a reverberant sound reflection surface.
  • reflected sound waves can act on the insulation board and / or on the sound-damping area assigned to the sound-reflecting surfaces on the rear side of the room sound absorber facing the reverberant sound reflection surface.
  • the additional attack surface or absorption surface for the sound waves causes a reduction of the reflected sound components and leads to a reduction in sound level in a room equipped with the room sound absorber. In particular, low frequencies are damped.
  • the change in the distance between the sound insulation panel and the softboard panel to the sound reflection surface generally entails a shift in the absorption capacity of the space sound absorber according to the invention. Already a distance of 10 mm between the room sound absorber and the sound reflection surface is sufficient to cause this effect.
  • a pleasing optical design can on the frame of the room sound absorber on a front side opposite the back a cover frame with textile or other reference for covering the insulation plate, and / or the acoustic fleece attached.
  • the textile cover is sound permeable. It can be printed on as long as the sound permeability of the textile cover is only negligibly affected.
  • FIGURE of the drawing shows a room sound absorber 1 according to the invention for positioning in front of a reverberant sound reflection surface 2 of a building or furnishing object not shown in the drawing in a sectional view.
  • the room sound absorber 1 is rectangular in view and he is level. It has a flat design, in which the typical depth corresponds to about 40 to 50 mm. The area can be arbitrary and can be easily adapted to the size of the sound reflection surface 2.
  • the room sound absorber 1 can be used both on ceilings and on walls or floors. Depending on the size of the room sound absorber 1 and the associated sound reflection surface 2, one or more room sound absorbers 1 can be arranged in front of the sound reflection surface 2. It is expedient to arrange a plurality of individual smaller room sound absorbers 1 in front of the reverberant sound reflection surface 2 at a greater distance from one another, since in this way a higher absorption than in close together, a nearly continuous surface forming space sound absorbers 1 is achieved.
  • the room sound absorber 1 has a reverberant frame 3 made of wood, in which a soundproof insulation board 4 made of a flexible PU foam central Schalldämpf Scene 5 is added. Two further sound-damping areas 5 'in the form of a soft-fiber plate 6 and an air cushion 7 adjoin the insulation panel 4 at a distance.
  • the soft-fiber plate 6 is arranged on one of the sound reflection surface 2 associated flat side 8 and the air cushion 7 on one of the flat side 8 opposite flat side 8 'of the insulation board 4.
  • the air cushion is enclosed between a closed film 9, which is arranged at a distance from the insulating panel 4, the insulating panel 4 and the frame 3.
  • the sound-proof insulation board 4, which has a thickness of about 2-3 cm, is due to the somewhat more sound-proof softboard 6, which has only a thickness of a few millimeters.
  • the sound-damping regions 5, 5 'of the room sound absorber 1 are designed to absorb sound waves and dampen the sound waves in their amplitude.
  • the soft-fiber plate 6 and the gas cushion 7, which adjoin the foamed insulation board 4 on flat sides 8, 8 ', have a different sound propagation speed, a different density or a different resistance for sound waves compared to the insulation board 4.
  • the air cushion 7, the insulating plate 4 and the soft-fiber plate 6 absorb different frequencies of sound waves.
  • the room sound absorber 1 has a limited sound-permeable cover 10 made of an acoustic fleece 10, which envelops the insulation board 4, the softboard 6, the air cushion 7 and the frame 3.
  • the acoustic nonwoven 10 is at or without distance to the soft board 6 and at a distance from the air cushion 7, i. arranged at a distance from the film 9. It optionally includes a first air layer 11 between itself, the frame 3 and the soft fiber plate 6 and a second air layer 11 'between itself, the frame 3 and the film 9 of the air cushion 7 a.
  • the acoustic fleece 10 forms with the two air layers 11, 11 'further Schalldämpf Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff
  • the space sound absorber according to the invention is designed broadband. It effectively dampens sound waves with frequencies between about 20 and 5000 Hz.
  • the different Schalldämpf Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Kunststoff Berline 5 to 5 "absorb partially different Frequency bands. If sound waves of particular frequencies are not to occur or are not to be damped, one or more of the corresponding sound-damping regions 5 to 5 "of the inventive room sound absorber 1 can be dispensed with in general Depending on the frequency range of the sound waves to be damped, the insulating board 4, the softboard 6, the the air cushion 7 limiting film 9 and the acoustic fleece 10 omitted.
  • the frame 3 has at one of the sound reflection surface 2 associated rear side 12 a plurality of spacers 13 which provide an air gap 14 between the space sound absorber 1 and the sound reflection surface 2 safe. This ensures that sound waves can act on the room sound absorber 1 from one of the sound reflection surface 2 facing away from as well as facing side.
  • the room sound absorber 1 has a textile cover 15, which is connected to a cover frame 16.
  • the cover frame 16 with the textile cover 15 is attached to a front side 17 of the frame 3 opposite the rear side 12. It can be detachably formed by the frame 3.
  • the fabric cover 15 covers the insulation board 4, the soft fiber plate 6, the film 9 and the acoustic fleece 10 from. It can be colored or printed.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)
EP09013256A 2009-10-21 2009-10-21 Absorbeur de bruits ambiants Withdrawn EP2314783A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09013256A EP2314783A1 (fr) 2009-10-21 2009-10-21 Absorbeur de bruits ambiants
PCT/EP2010/006310 WO2011047806A2 (fr) 2009-10-21 2010-10-15 Absorbeur de bruits ambiants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09013256A EP2314783A1 (fr) 2009-10-21 2009-10-21 Absorbeur de bruits ambiants

Publications (1)

Publication Number Publication Date
EP2314783A1 true EP2314783A1 (fr) 2011-04-27

Family

ID=42199170

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09013256A Withdrawn EP2314783A1 (fr) 2009-10-21 2009-10-21 Absorbeur de bruits ambiants

Country Status (2)

Country Link
EP (1) EP2314783A1 (fr)
WO (1) WO2011047806A2 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2081953A (en) * 1932-09-08 1937-06-01 Johns Manville Sound damping structure
DE2726101A1 (de) * 1977-06-10 1978-12-21 Vki Rheinhold & Mahla Ag Reflexionsarme wandverkleidung
DE3134396A1 (de) * 1981-08-31 1983-03-10 Huyck Corp., 27587 Wake Forest, N.C. Laminatstruktur fuer akustische anwendungen und verfahren zu ihrer herstellung
DE4027511C1 (fr) 1990-08-30 1991-10-02 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen, De
EP0768440A1 (fr) * 1995-10-13 1997-04-16 Pfleiderer Dämmstofftechnik GmbH & Co. Elément isolant en laine minérale en forme de panneau
DE202004009370U1 (de) 2004-06-15 2004-09-23 Owa Odenwald Faserplattenwerk Gmbh Modularer Schallabsorber
EP1630311A2 (fr) * 2004-08-25 2006-03-01 Sabine Keggenhoff Dispositif d'absorption acoustique, en particulier pour le montage sur un plafond ou mur
DE202006000201U1 (de) * 2006-01-09 2006-03-30 Knauf Gips Kg Raumelement zur decken- oder wandseitigen Befestigung
WO2007073732A2 (fr) * 2005-12-23 2007-07-05 Wilson-Acoustix Gmbh Absorbant acoustique poreux multicouche

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2081953A (en) * 1932-09-08 1937-06-01 Johns Manville Sound damping structure
DE2726101A1 (de) * 1977-06-10 1978-12-21 Vki Rheinhold & Mahla Ag Reflexionsarme wandverkleidung
DE3134396A1 (de) * 1981-08-31 1983-03-10 Huyck Corp., 27587 Wake Forest, N.C. Laminatstruktur fuer akustische anwendungen und verfahren zu ihrer herstellung
DE4027511C1 (fr) 1990-08-30 1991-10-02 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen, De
EP0768440A1 (fr) * 1995-10-13 1997-04-16 Pfleiderer Dämmstofftechnik GmbH & Co. Elément isolant en laine minérale en forme de panneau
DE202004009370U1 (de) 2004-06-15 2004-09-23 Owa Odenwald Faserplattenwerk Gmbh Modularer Schallabsorber
EP1630311A2 (fr) * 2004-08-25 2006-03-01 Sabine Keggenhoff Dispositif d'absorption acoustique, en particulier pour le montage sur un plafond ou mur
WO2007073732A2 (fr) * 2005-12-23 2007-07-05 Wilson-Acoustix Gmbh Absorbant acoustique poreux multicouche
DE202006000201U1 (de) * 2006-01-09 2006-03-30 Knauf Gips Kg Raumelement zur decken- oder wandseitigen Befestigung

Also Published As

Publication number Publication date
WO2011047806A3 (fr) 2012-02-23
WO2011047806A2 (fr) 2011-04-28

Similar Documents

Publication Publication Date Title
US6675551B1 (en) Plate-shaped constructional element and method
RU2366785C2 (ru) Акустическая конструкция для производственных помещений
EP0697051B1 (fr) Faux plafond
EP2394265B1 (fr) Absorbeur acoustique, convertisseur acoustique et procédé de fabrication d'un absorbeur acoustique ou d'un convertisseur acoustique
EP2841660A1 (fr) Élément d'absorption acoustique
EP3260782B1 (fr) Hotte aspirante
JP2008009014A (ja) 多孔質防音構造体
EP2026994A2 (fr) Isolation a effet acoustique et thermique
JP2008138505A (ja) 吸音構造体
DE19506511A1 (de) Plattenresonator
WO2009053349A2 (fr) Absorbeur phonique
CH706392A2 (de) Schallabsorbierendes Element.
KR100468296B1 (ko) 방음패널 및 그를 위한 다공판
EP1034920A1 (fr) Enveloppe antibruit
RU2639213C2 (ru) Многослойная акустическая панель
AT515271B1 (de) Schalldämpfungselement
EP3635188A1 (fr) Paroi de séparation
DE10151474A1 (de) Schallabsorber mit streifenförmiger schalldichter Abdeckung
KR200450881Y1 (ko) 복합 방음 패널
JPH09228506A (ja) 吸音体
EP2314783A1 (fr) Absorbeur de bruits ambiants
DE102019128209B4 (de) Schallabsorbierende Vorrichtung mit Noppenfolienverbund und Verwendung
CN210531248U (zh) 一种风机消音器
DE202021001457U1 (de) Schalldämmendes Element für Fensterlaibungen
WO1994024382A1 (fr) Faux plafond

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20111101