WO2006069951A1 - Isolant acoustique poreux lateral a intervalle d'air local - Google Patents

Isolant acoustique poreux lateral a intervalle d'air local Download PDF

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Publication number
WO2006069951A1
WO2006069951A1 PCT/EP2005/057050 EP2005057050W WO2006069951A1 WO 2006069951 A1 WO2006069951 A1 WO 2006069951A1 EP 2005057050 W EP2005057050 W EP 2005057050W WO 2006069951 A1 WO2006069951 A1 WO 2006069951A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
air
foam
permeable
limiting element
Prior art date
Application number
PCT/EP2005/057050
Other languages
German (de)
English (en)
Inventor
Hans-Peter Keller
Heinz-Jürgen Mehler
Stefan Janzen
Original Assignee
Pelzer Acoustic Products Gmbh
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 Pelzer Acoustic Products Gmbh filed Critical Pelzer Acoustic Products Gmbh
Publication of WO2006069951A1 publication Critical patent/WO2006069951A1/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
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Definitions

  • the invention relates to a room delimitation element for sound insulation and absorption of high-frequency noise and the use of this space-limiting element for sound insulation and absorption of high-frequency noise in vehicles.
  • WO 98/14368 A2 describes a sound insulation system for the insulation of low-frequency noise in aircraft.
  • this system is not suitable for sound absorption of high-frequency noise, since the air gap, which may be formed for example as a honeycomb structure, is covered with an air-impermeable layer.
  • EP 0 849 146 A2 also describes a wall element for sound insulation in passenger cabins of aircraft.
  • This Soundproofing element has a complex structure in which not only a local air gap in the form of honeycomb elements but in addition to a lateral air gap is necessary.
  • the carrier material is in this case designed to be permeable to air, while a flexible outer layer is formed impermeable to air and is located by means of an air gap at a small distance from the carrier.
  • US 4,739,955 A describes a sound insulation system for aircraft which has neither air gap nor absorbent surfaces and therefore is not suitable for sound absorption of high-frequency noise.
  • EP 0 631 862 A1 describes lining panels for the interior of aircraft, which are therefore not suitable for the sound absorption of high-frequency noise, since they do not comprise any air gap or absorbent surfaces.
  • DE 30 25 617 A1 describes a sound insulation panel in sandwich construction for use in the vicinity of rapid air or gas flows, with a honeycomb core, a plurality of thin sheet formed, extending transversely to the plate cells, with a glued to the honeycomb side outer perforated plate and with a on the another honeycomb side glued outer solid sheet, wherein on the outer side of the perforated plate, a thin layer of porous fiber material is glued, wherein an adhesive the perforated plate from the fiber material isolated, the pores on the holes of the perforated plate define a defined narrowed connection between the outside atmosphere and the cells of the honeycomb core ,
  • the object of the present invention is in contrast to provide an improved room boundary element for sound insulation, which in addition to the soundproofing for low, medium and high-frequency noise and simultaneous broadband high absorption and has a very simple and self-supporting structure with the widest possible use already used and proven materials, so that the space-limiting element can be easily manufactured and installed.
  • the object of the invention is achieved by a space limiting element 1 for sound insulation and in particular for sound absorption of high-frequency noise, comprising a self-supporting, air-impermeable carrier layer 2, an air-permeable spacer layer 3 made of a honeycomb structure in contact with the carrier layer 2 and filled with an open-cell foam in the area opposite the carrier layer 2, and an air-permeable cover layer located on the spacer layer 3 4, wherein the air-permeable cover layer 4 has an air flow resistance of up to 2500 kNs / m 4 .
  • the carrier layer 2 which ensures that the space-limiting element 1 is self-supporting, air-impermeable and thus good sound insulation and all layers thereon, such as Spacer layer 3 or the cover layer 4 are formed permeable to air. It has been observed that low air flow resistance of the cap layer 4 results in high absorption of high frequencies, while high air flow resistance has reduced absorption of high frequency noise but better absorption of low frequency noise.
  • the air flow resistance of the air-permeable cover layer 4 is preferably up to 1000 kNs / m 4 , more preferably up to 500 kNs / m 4 and most preferably up to 100 kNs / m 4 .
  • sound having a frequency of at least 2000 Hz.
  • the honeycomb structure in the surface area opposite the support layer 2 is filled with an open-celled foam.
  • the open-cell foam ensures improved sound absorption. It is possible to fill the honeycomb core partially or completely with the foam.
  • the foam must in this case have a good connection with the side walls of the honeycomb core, so that the foam is fixedly embedded in the honeycomb core.
  • Introduction of the foam in the honeycomb structure can be carried out in various ways. For example, melamine resin foam at a temperature of 200 0 C under pressure partially or completely penetrate into the corresponding cells.
  • the Zeilpenetrationstiefe depends on the foam thickness and the cell dimensions, such as the width and depth.
  • the support surface of the honeycomb structure must be freed from adhering foam to firmly connect the carrier layer 2 or the cover layer 4 with the honeycomb core.
  • foams are suitable for filling the honeycomb core.
  • flame-retardant or nonflammable foams for example of melamine resin foam or phenolic resin foam
  • foams having a density in the range from 5 to 20 kg / m 3 are therefore particularly preferred.
  • the air flow resistance of the foam should preferably be in the range of 10 to 1500 kNs / m 4 . If the air flow resistance is too high, the sound absorption quality is too low. If the air flow resistance is too small, an insufficient sound absorption is likewise given.
  • the porosity of the foam is preferably 0.4 to 0.99, in particular 0.8 to 0.99.
  • Porosity in the sense of the present invention describes the ratio of the pore volume to the total volume. As a result, the flow resistance is significantly influenced.
  • tortuosity Another parameter that can be stated regardless of the type of porous material is the tortuosity or the structural factor.
  • the concept of tortuosity is used for various physical properties of porous materials.
  • the parameter tortuosity covers the fact that the pores form channels that are not straight but curved and have a variable cross-section.
  • the simplest definition of tortuosity in the sense of the present invention is the ratio of an actual path length between inlet and outlet surface to the distance between the two, so the shortest path length. Also this size is like the porosity dimensionless.
  • the tortuosity is in the range of 1.5 to 5. Outside this specified range, the sound absorption quality is not sufficient.
  • each of the processed materials is incombustible and / or complies with the safety-relevant standards that apply, for example, to aircraft interior linings.
  • the layer thickness ratio of cover layer 4 to spacer layer 3 is in a range of 1: 1 to 1: 5, more preferably in a range of 1: 3 to 1: 4, most preferably 1: 2.
  • the sound absorption effect is ideal for high-frequency noise optimal.
  • the spacer layer 3 is advantageously permeable to air permeable to the layer and particularly preferably designed as a honeycomb structure. Because the air gap or the spacer layer 3 is not formed laterally but preferably locally in honeycomb form, these honeycombs can form so-called Helmholtz resonators, which represent particularly efficient sound absorbers, especially for high-frequency noise.
  • the web spacing of the honeycomb is in a range of 2 to 40 mm, more preferably in a range of 4 to 18 mm, and most preferably 12 mm.
  • the air gap or the spacer layer 3 is advantageously made of paper or paper-like material, more preferably of flame-retardant paper material, which is sold for example by DuPont under the brand NOMEX ® .
  • the cover layer 4 may consist of several sub-layers 5 to 8.
  • the cover layer 4 or at least one of the sub-layers 5 is perforated.
  • the covering layer 4 or at least one sub-layer 5 is microperforated or micro-perforated, most preferably the hole diameter of the micro-perforation is 0.1 to 5 mm, in particular 0.2 to 3 mm. Due to the perforation of the covering layer 4 or at least one lower layer 5 of the covering layer 4, the honeycombs of the spacer layer 3 can act as Helmholz resonators and the covering layer 4 can nevertheless have a particularly low air flow resistance.
  • the hole area ratio that is, the ratio of the perforated area to the non-perforated area of the microperforated layer is preferably 0.1 to 20%, more preferably 0.2 to 5%.
  • the layer thickness of the spacer layer 3 is preferably in a range of 2.5 to 15 mm, more preferably 3 to 10 mm, and most preferably 6 mm.
  • the density of the spacer layer 3 is advantageously within a range
  • the covering layer 4 as a whole has a layer thickness in a range from 0.8 to 22 mm, particularly preferably in a range from 1 to 2 mm.
  • the covering layer can consist of different sublayers 5 to 8.
  • Adjacent to the spacer layer 3 may be a grid or net-like or perforated plate 7, which preferably has a thickness in the range of 0.2 to 4 mm and a density in the range of 250 to 1500 kg / m 3 .
  • This plate 7 can advantageously from Metal preferably consist of polymers.
  • the plate 7 is advantageously perforated, slotted, latticed or net-shaped, in each case with an open area of 2 to 65%, preferably 25 to 35%.
  • a film 5 may be provided as the next sub-layer which is perforated or slit and has a thickness in the range of 0.05 to 2 mm and a density in the range of 950 to 2700 kg / m 3 .
  • This layer is preferably made of plastic, metal foil or incombustible, resin impregnated paper and having a density in the range of 950 to 1350 kg / m 2 .
  • a porous layer 8 with a specially selected air flow resistance may be provided as the next sub-layer, preferably having a layer thickness in the range of 0.3 to 4 mm and a density in a range of 150 to 600 kg / m 3 and an air flow resistance in a range of 20 to 5000 kNs / m 4 , preferably 500 to 2500 kNs / m 4 .
  • This layer 8 is preferably made of textile material, for example glass fibers, mineral fibers, aramid fibers, polypropylene or polyester microfiber or fine fibers and / or resin-bonded cotton felt.
  • the covering layer 4 advantageously comprises a textile covering layer 6 as outer sub-layer.
  • the thickness of this lining layer 6 is advantageously 0.3 to 5 mm and very particularly preferably 0.5 to 1.5 mm.
  • the density of the textile cladding layer 6 according to the invention is advantageously 100 to 600 kg / m 3 and very particularly preferably 350 to 550 kg / m 3 .
  • the air flow resistance of the textile cladding layer 6 according to the invention is preferably 100 to 2000 kNs / m 4 and very particularly preferably 500 to 800 kNs / m 4 .
  • the textile lining layer 6 is preferably made of a material selected for example from the group Lantal ® 3817 LS / 35, Lantal ® 3286 LS / 330 Lantal ® 3254 LS / 408, 857/600 Basic Lantal ®, 3M Thinsulate ®, polypropylene microfiber resin-bonded cotton felt, Sandler ® sawasorb ®, ® Caruso, Innovatec ® PP, Libeltec ® QW-500, PES felt, Lantal Melair ® ®, particularly preferably from Lantal ® 3254 LS / 408th
  • the entire space-limiting element 1 advantageously has a total thickness in a range of 4 to 9 mm and a basis weight in a range of 0.9 to 1.9 kg / m 2 .
  • the object underlying the invention is achieved by the use of the room boundary element 1 for sound insulation and sound absorption of high-frequency noise in passenger transport means.
  • the space-limiting element 1 is used as a side wall cladding and / or ceiling cladding of aircraft, water and in particular of aircraft.
  • the space-limiting element 1 can preferably also be used for sound insulation and sound absorption in elevators, door linings, trunk linings, as a headliner in motor vehicles or aircraft cabins or as a cabin partition in aircraft cabins or similar applications. Description of the figures:
  • the space delimiting element 1 consists of the carrier layer 2, the spacer layer 3 thereon.
  • the covering layer 4 is thereon, which in turn is obligatory from the lower layers 6 and 7, optionally from the lower layers 5 and / or 8 can exist.
  • the sublayers 5 to 8 are:
  • Fig. 3 shows the comparison of a foam filled honeycomb core with an unfilled honeycomb core.
  • Thinsulate ® 7200 material 8 having a basis weight of 0.13 kg / m 2 and an air flow resistance of 1500 kNs / m 4 is applied.
  • Thinsulate ® layer 8 a 4.7 mm thick layer 6 of the material was as the last layer 3254 LS / 408
  • Fig. 2 illustrates the measurement results for layer systems containing all of these aforementioned layers or some selected layers.
  • the curve a) for the absorption behavior of the carrier layer 2 according to the embodiment alone with the spacer layer 3 the curve b) for the absorption behavior of the carrier layer 2 according to the embodiment, the spacer layer 3 with the textile cladding layer 6, the curve c) for the absorption behavior of the backing layer 2 according to the embodiment, the distance layer 3, the Thinsulate ® layer 8 with the textile cladding layer 6, the curve d) for the absorption behavior of the backing layer 2 according to the embodiment, the distance layer 3, the perforated aluminum layer 7 and the Thinsulate ® layer 8 with the textile cladding layer 6, and the curve e) for the absorption behavior of the carrier layer 2 according to the comparative example, the spacer layer 3, a perforated aluminum layer 7 and the Thinsulate ® layer 8 with the textile lining layer. 6
  • the honeycomb core was filled with a commercially available melamine resin foam.
  • the melamine resin foam was pressed under pressure and temperature in the open honeycomb.
  • the honeycomb core was completely filled. Foam overhanging the webs of the honeycomb core was removed by sanding.
  • FIG. 3 shows that the honeycomb core filled with foam absorber exhibits improved sound absorption compared to the unfilled honeycomb core, especially at low and medium frequencies.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention concerne un élément de délimitation d'espace (1) pour l'isolation acoustique et, en particulier, pour l'absorption acoustique de bruits parasites haute fréquence, comprenant une couche support autoportante, imperméable à l'air (2), une couche d'écartement perméable à l'air (3), se trouvant en contact avec la couche support (2), ayant une structure en nid d'abeilles, et qui est remplie d'un produit mousse à cellules ouvertes, dans la zone superficielle opposée à la couche support (2), et une couche de recouvrement perméable à l'air (4) située sur la couche d'écartement (3), la couche de recouvrement perméable à l'air (4) présentant une résistance à l'écoulement d'air de l'ordre de 2500 kNs/m4.
PCT/EP2005/057050 2004-12-23 2005-12-21 Isolant acoustique poreux lateral a intervalle d'air local WO2006069951A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410062103 DE102004062103A1 (de) 2004-12-23 2004-12-23 Poröser, lateraler Schallabsorber mit lokalem Luftspalt
DE102004062103.9 2004-12-23

Publications (1)

Publication Number Publication Date
WO2006069951A1 true WO2006069951A1 (fr) 2006-07-06

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DE (1) DE102004062103A1 (fr)
WO (1) WO2006069951A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110868753A (zh) * 2018-08-27 2020-03-06 成都鼎桥通信技术有限公司 资源分配方法、装置及系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019118591B4 (de) * 2019-07-09 2022-02-10 Deutsche Institute Für Textil- Und Faserforschung Denkendorf Schallabsorberanordnung

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083595A (en) * 1975-06-12 1978-04-11 Daimler-Benz Aktiengesellschaft Multi-layer sound- and vibration-absorbing cover panels for body parts and method for applying same
DE3025617A1 (de) 1979-07-06 1981-02-12 Rohr Industries Inc Schalldaemmplatten in sandwichbauweise und verfahren zu ihrer herstellung
FR2470679A1 (fr) * 1979-11-30 1981-06-12 Matec Holding Perfectionnements aux complexes destines a l'insonorisation et aux panneaux equipes de tels complexes
US4441578A (en) * 1981-02-02 1984-04-10 Rohr Industries, Inc. Encapsulated bulk absorber acoustic treatments for aircraft engine application
US4739955A (en) 1986-09-30 1988-04-26 The Boeing Company Aircraft cabin panel and insulation retainer with integrated use as a spacer-isolator
US4799631A (en) 1987-02-18 1989-01-24 Atr International, Inc. Aircraft shell module
EP0330338A2 (fr) 1988-02-26 1989-08-30 Heath Tecna Aerospace Co Composite à basse émission de chaleur
DE4030478A1 (de) 1990-09-26 1992-04-02 Alkor Gmbh Verfahren und vorrichtung zur herstellung von kraftfahrzeugteilen, kraftfahrzeuginnenverkleidungen sowie flugzeuginnenverkleidungen
EP0631862A1 (fr) 1993-06-01 1995-01-04 General Electric Company Plaques pour l'équipement intérieur d'avions
WO1998014368A2 (fr) 1996-10-02 1998-04-09 Mcdonnell Douglas Corporation Systeme de suppression du bruit a basse frequence
EP0849146A2 (fr) 1996-12-18 1998-06-24 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Véhicule automobile, en particulier véhicule de passagers, avec un feu de signalisation suplémentaire dans le becquet arrière
DE19804718A1 (de) 1998-02-06 1999-08-19 Eurocopter Deutschland Sandwichwand
US6257366B1 (en) * 1995-09-13 2001-07-10 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Exhaust device for a turbine engine
DE10041458A1 (de) 2000-08-23 2002-03-14 Kaefer Isoliertechnik Einrichtung zum Vermindern von Schallpegel sowie Verkleidung in Flugzeugen, Fahrzeugen oder Schiffen
JP2004021246A (ja) * 2002-06-14 2004-01-22 Junsei:Kk 発泡体の粒子構造特定による吸音構造体

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083595A (en) * 1975-06-12 1978-04-11 Daimler-Benz Aktiengesellschaft Multi-layer sound- and vibration-absorbing cover panels for body parts and method for applying same
DE3025617A1 (de) 1979-07-06 1981-02-12 Rohr Industries Inc Schalldaemmplatten in sandwichbauweise und verfahren zu ihrer herstellung
FR2470679A1 (fr) * 1979-11-30 1981-06-12 Matec Holding Perfectionnements aux complexes destines a l'insonorisation et aux panneaux equipes de tels complexes
US4441578A (en) * 1981-02-02 1984-04-10 Rohr Industries, Inc. Encapsulated bulk absorber acoustic treatments for aircraft engine application
US4739955A (en) 1986-09-30 1988-04-26 The Boeing Company Aircraft cabin panel and insulation retainer with integrated use as a spacer-isolator
US4799631A (en) 1987-02-18 1989-01-24 Atr International, Inc. Aircraft shell module
EP0330338A2 (fr) 1988-02-26 1989-08-30 Heath Tecna Aerospace Co Composite à basse émission de chaleur
DE4030478A1 (de) 1990-09-26 1992-04-02 Alkor Gmbh Verfahren und vorrichtung zur herstellung von kraftfahrzeugteilen, kraftfahrzeuginnenverkleidungen sowie flugzeuginnenverkleidungen
EP0631862A1 (fr) 1993-06-01 1995-01-04 General Electric Company Plaques pour l'équipement intérieur d'avions
US6257366B1 (en) * 1995-09-13 2001-07-10 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Exhaust device for a turbine engine
WO1998014368A2 (fr) 1996-10-02 1998-04-09 Mcdonnell Douglas Corporation Systeme de suppression du bruit a basse frequence
EP0849146A2 (fr) 1996-12-18 1998-06-24 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Véhicule automobile, en particulier véhicule de passagers, avec un feu de signalisation suplémentaire dans le becquet arrière
DE19804718A1 (de) 1998-02-06 1999-08-19 Eurocopter Deutschland Sandwichwand
DE10041458A1 (de) 2000-08-23 2002-03-14 Kaefer Isoliertechnik Einrichtung zum Vermindern von Schallpegel sowie Verkleidung in Flugzeugen, Fahrzeugen oder Schiffen
JP2004021246A (ja) * 2002-06-14 2004-01-22 Junsei:Kk 発泡体の粒子構造特定による吸音構造体

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MC NICHOLS: "Expanded Metal Products", XP002378635, Retrieved from the Internet <URL:http://www.mcnichols.com/products/expanded/> [retrieved on 20060427] *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110868753A (zh) * 2018-08-27 2020-03-06 成都鼎桥通信技术有限公司 资源分配方法、装置及系统
CN110868753B (zh) * 2018-08-27 2022-08-12 成都鼎桥通信技术有限公司 资源分配方法、装置及系统

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