WO2007137607A1 - Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells - Google Patents
Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells Download PDFInfo
- Publication number
- WO2007137607A1 WO2007137607A1 PCT/EP2006/005161 EP2006005161W WO2007137607A1 WO 2007137607 A1 WO2007137607 A1 WO 2007137607A1 EP 2006005161 W EP2006005161 W EP 2006005161W WO 2007137607 A1 WO2007137607 A1 WO 2007137607A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sound
- sandwich element
- core structure
- cover layers
- inner cladding
- Prior art date
Links
- 238000005253 cladding Methods 0.000 title claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000035515 penetration Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 11
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 239000007769 metal material Substances 0.000 claims description 6
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 5
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 210000004027 cell Anatomy 0.000 description 12
- 239000004744 fabric Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 229920000544 Gore-Tex Polymers 0.000 description 1
- 229920000784 Nomex Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0815—Acoustic or thermal insulation of passenger compartments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/40—Sound or heat insulation, e.g. using insulation blankets
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
Definitions
- the invention relates to a sandwich element for a sound-absorbing inner cladding of transport means, especially for a sound-absorbing inner cladding of aircraft, comprising an especially honeycomb-shaped core structure and cover layers applied to both sides of the core structure.
- Sandwich elements are widely used in aircraft construction. Of particular advantage here are the favourable mechanical properties which can be achieved with sandwich elements combined with a low weight.
- Known core structures in many cases have a honeycomb-shaped core structure with cover layers applied to both sides.
- the honeycomb-shaped core structure is characterised by repeated units which are closed in themselves, having a substantially hexagonal base surface. As a result of the cover layers being bonded to the honeycomb-shaped core structure, these repeated units form cells which are closed in themselves.
- Conventional sandwich panels which are constructed using honeycomb-shaped core structures, for example, generally do not have adequate sound absorption properties to satisfy current requirements for sound protection, especially when forming inner claddings of fuselage cells.
- An object of the invention is to provide a sandwich element, especially for forming sound-absorbing inner claddings for fuselage cells of aircraft which also has good sound absorption properties as a further development of the usual sandwich elements.
- the sandwich element should have a sufficient mechanical loading capacity and only a low weight at the same time.
- the sandwich element according to the invention should also have sufficient heat insulating properties.
- the sandwich element according to the invention may have excellent sound absorption properties at the same time as a high mechanical loading capacity and a low weight. Sound impinging upon the sandwich element from outside may pass through the covering and at least one cover layer constructed as permeable to air, almost undamped through the core structure of the sandwich element and may then be largely absorbed in the sound absorption layer.
- the covering applied at least in sections to at least one cover layer may largely prevent any undesirable penetration of foreign bodies and/or liquids into the core structure.
- the sound absorption layer at the same time may bring about good heat insulation properties of the sandwich element.
- the cover comprises a plurality of openings, wherein the openings each have a cross-sectional area which largely prevents the penetration of foreign bodies and/or liquids and allows the transmission of sound.
- the openings in the covering may ensure a largely unhindered transmission of sound incident on the sandwich element from outside.
- the cover layer or the cover layers have a plurality of passages wherein these passages have cross-sectional areas which allow the transmission of sound.
- This embodiment initially may make it possible to apply the cover layers to the core structure largely in accordance with the known procedure for coating core structures because a sufficient number of webs may remain between the passages which in their entirety constitute an adequate area for bonding to the core structure located thereunder.
- the passages in the cover layers may allow almost undamped transmission of sound through the cover layers and the core structures as far as the sound absorption layer.
- a further exemplary embodiment provides that the passages in the cover layer or in the cover layers preferably each have larger cross-sectional areas than the openings in the covering. This may ensure almost unhindered penetration of sound through the cover layers whereas the penetration of foreign bodies and/or liquids through the covering may be largely avoided.
- Fig. 1 is an isometric view of a sandwich element according to an exemplary embodiment of the invention.
- Fig. 2 is an exploded isometric diagram of the sandwich element according to an exemplary embodiment of the invention. Detailed Description of an exemplary Embodiment
- Figure 1 shows an isometric view of the sandwich element according to an exemplary embodiment of the invention.
- the sandwich element 1 comprises, among other things, a core structure 2 on which cover layers 3, 4 are applied to both sides.
- a sound absorption layer 5 is also disposed on the cover layer 4.
- a covering 6 is applied to the upper cover layer 3, preferably over the entire area, which covering allows the transmission of sound but largely prevents the penetration of foreign bodies and/or liquids into the core structure 2.
- Figure 2 shows an exploded isometric diagram of the sandwich element according to an exemplary embodiment of the invention.
- the core structure 2 is formed in a known fashion by a plurality of adjoining honeycomb-shaped cells. After application of the cover layers 3, 4, the honeycomb- shaped cells each form small-volume repeating units which are closed in themselves.
- the sound absorption layer 5 for absorption of the incident sound is applied to the cover layer 4. As an auxiliary effect, the sound absorption layer 5 also improves the heat insulating properties of the sandwich element 1 according to the invention.
- the covering 6 is preferably disposed over the entire area of the cover layer 3.
- the covering 6 reduces the penetration of foreign bodies and/or liquids into the core structure 2 and the sound absorption layer 5.
- the cover 6 comprises a plurality of openings which are not shown in detail in the drawing for the sake of better clarity.
- the openings preferably have such a small cross-sectional area that air and therefore also sound can pass through but liquids and/or foreign bodies are largely kept away from the inner area of the core structure 2. Sound waves 7 incident on the sandwich element 1 from outside thus pass largely undamped through the covering 6.
- the cover layers 3, 4 also have a plurality of passages 8 of which only four, representative of the others, have been provided with a reference number for the sake of clarity of the drawing in the diagram in Fig. 2.
- the passages 8 are distributed substantially uniformly spaced apart from one another over the surfaces of the cover layers 3, 4, especially are arranged in matrix form.
- the passages 8 have considerably larger cross-sectional areas to allow the unhindered passage of sound waves 7 as far as possible.
- the passages 8 does not need to prevent the undesired passage of foreign bodies and/or liquids into the core structure 2.
- the sound absorption layer 5 is applied over the entire area and directly to the cover layer 4.
- the sound absorption layer 5 can be arranged at a distance from the cover layer 4. In this case, an intermediate air space exists between the sound absorption layer 5 and the cover layer 4.
- the sandwich element 1 according to the invention has a good sound damping effect.
- a further improvement in the sound damping effect can be achieved, for example, by the core structure 2 being additionally provided, at least in sections, with a sound-absorbing coating, for example, with a flocking of foamed plastics.
- the sound absorption layer 5 can, for example, be formed using glass or mineral wool. Alternatively, the sound absorption layer 5 can also be formed using a spun yarn of fine metal fibres, carbon fibres, plastic fibres and also using open-pore foamed plastics. Alternatively the sound absorption layer 5 can also be formed using natural fibres.
- the core structure 2 with the honeycomb-shaped cells can be formed using a fibre- reinforced plastic material, for example, using epoxy-resin-impregnated Nomex ® paper or the like.
- the core structure 2 can also be formed using a metal material, for example, using aluminium, an aluminium alloy, steel or titanium.
- the honeycomb-shaped cells of the core structure 2 can each have one or more small slits having a relatively small cross-sectional area compared to the wall surface of the cell. Any condensate water which may be present in the honeycomb- shaped cells of the core structure 2 can flow off through these slits in a controlled manner.
- the slits are thus used in the broadest sense for drainage of the core structure 2. Moisture-induced damage to the core structure 2 by corrosion or rotting processes is hereby largely avoided.
- the cell walls of the honeycomb- shaped cells of the core structure 2 comprise openings, at least in sections, especially cylindrical passages arranged in the form of perforations.
- the cover layers 3, 4 can, for example, be formed using a composite material made of a fibre-reinforced plastic material, for example, using carbon-fibre or glass-fibre- reinforced prepregs with epoxy resin or polyester resin.
- the passages 8 arranged in matrix form can then be incorporated in the prepregs to form the cover layers 3, 4 where, as a result of the plurality of passages 8 to be incorporated, a weakening of the entire fibre reinforcement of the cover layer 3,4 can occur, since the fibre reinforcement is usually separated in the area of the passages 8.
- the passages 8 preferably form a surface-covering continuous perforation in the respective cover layer 3, 4.
- the passages 8 can be incorporated, for example, by known mechanical drilling or stamping methods in the cover layers 3, 4.
- the passages 8 When the passages 8 are produced by drilling or stamping methods, the passages 8 preferably have a circular cross- sectional area. A cross-sectional geometry different from circular is also possible if corresponding tools are used.
- cover layers 3, 4 can also be formed using a surface knitted fabric or using a fabric-like resin-impregnated structure.
- Strands can be used, for example, to form the surface knitted fabric.
- the strands are preferably spaced uniformly apart and arranged approximately parallel to one another to form a first layer. At least two layers arranged one above the other then form a surface knitted fabric which then has a coarse fabric-like structure.
- the layers are preferably arranged one above the other, twisted relative to one another at an angle greater than 0°. Furthermore, it is possible to interweave the strands alternately with one another at least in sections.
- the strands can be formed, for example, using glass, carbon, plastic or natural fibres which are impregnated with resin either before or after the formation of the layers to finally create the cover layers 3, 4.
- the cover layers 3, 4 formed by a surface knitted fabric have a coarse fabric-like or net-like structure.
- the meshes of the surface knitted fabric in this case each form the passages 8 of the cover layers 3, 4 where the meshes preferably each have a cross-sectional area smaller than the cross-sectional area of the respective cells of the honeycomb-shaped core structure 2 in order to achieve a sufficient mechanical bonding of the cover layers 3, 4 to the core structure 2.
- the cross- sectional geometries of the meshes depend on the structure of the surface knitted fabric used but generally differ from the circular shape.
- the formation of the cover layers 3, 4 using a surface knitted fabric especially has the advantage that no mechanical processing of the starting material used to manufacture the cover layers 3, 4 is required to form the passages 8, for example, by drilling or stamping "prepregs". This is because mechanical processing generally results in an undefined, at least local destruction of the fibre reinforcement in the area of the passages 8 and with this a deterioration in the mechanical properties of the sandwich element 1 formed therefrom.
- the cover layers 3, 4 can furthermore be formed using metal sheets, metal films or the like.
- metal sheets, metal films or the like in particular aluminium, an aluminium alloy, steel or titanium can be considered as metal material for the cover layers 3, 4.
- the advantage of using a metal material to form the cover layers 3, 4 is especially that the passages 8 can simply be formed by mechanical processing, for example, by stamping, drilling or the like, which do not result in any significant mechanical weakening of the material as is the case when drilling or stamping is incorporated in fibre-reinforced prepregs of composite material.
- the cover layers 3, 4 can alternatively be formed using non-fibre-reinforced plastic materials, for example, using plastic films, plastic panels or foamed plastic panels.
- both the cover layers 3,4 and also the core structure 2 can be formed using any combination of composite materials, fibre-reinforced plastic materials, foamed plastic materials, plastic materials and/or metal materials according to the type described previously.
- the covering 6 can be formed using a surface structure or using a surface knitted fabric which on the one hand allows transmission of sound but on the other hand largely retains foreign bodies and/or liquids.
- Known semi-permeable membranes such as, for example GoreTex ® , Sympatex ® , or the like can be used to form the covering having a surface structure.
- Fabric or materials having the aforesaid properties can also be used as surface knitted fabric to form the covering 6.
- the mechanical bonding of the cover layers 3, 4 to the core structure 2, the covering 6 and the sound absorption layer 5 is effected by known joining methods such as hot or cold adhesion methods or general welding methods, for example, depending on the type and condition of the materials to be joined.
- the joining can also take place by riveting, adhesive strips or the like.
- the material thickness of the cover layers 3, 4 and the core structure 2 generally has relatively low values.
- the material thickness of the cover layers 3, 4 is usually less than 10 mm and the height of the core structure 2 is less than 50 mm.
- the sound absorption layer 5 preferably has a material thickness of less than 100 mm.
- the material thickness of the covering 6 is preferably less than 10 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- Multimedia (AREA)
- Aviation & Aerospace Engineering (AREA)
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNA2006800547854A CN101448700A (en) | 2006-05-30 | 2006-05-30 | Core component for sound-absorbing inner coatings of transportation facilities, especially sound-absorbing inner coatings of airframe units of aircrafts |
PCT/EP2006/005161 WO2007137607A1 (en) | 2006-05-30 | 2006-05-30 | Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells |
CA002651742A CA2651742A1 (en) | 2006-05-30 | 2006-05-30 | Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells |
JP2009512417A JP2009538746A (en) | 2006-05-30 | 2006-05-30 | Sandwich member for sound-absorbing inner cladding of transport means, in particular sandwich member for sound-absorbing inner cladding of aircraft fuselage cells |
EP06753991A EP2021237A1 (en) | 2006-05-30 | 2006-05-30 | Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells |
US12/227,841 US20100247848A1 (en) | 2006-05-30 | 2006-05-30 | Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells |
BRPI0621653-6A BRPI0621653A2 (en) | 2006-05-30 | 2006-05-30 | sandwich element for transport sound absorbing inner liner, especially for aircraft fuselage cell sound absorbing inner liner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2006/005161 WO2007137607A1 (en) | 2006-05-30 | 2006-05-30 | Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007137607A1 true WO2007137607A1 (en) | 2007-12-06 |
Family
ID=37768601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/005161 WO2007137607A1 (en) | 2006-05-30 | 2006-05-30 | Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells |
Country Status (7)
Country | Link |
---|---|
US (1) | US20100247848A1 (en) |
EP (1) | EP2021237A1 (en) |
JP (1) | JP2009538746A (en) |
CN (1) | CN101448700A (en) |
BR (1) | BRPI0621653A2 (en) |
CA (1) | CA2651742A1 (en) |
WO (1) | WO2007137607A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008115301A2 (en) | 2007-01-23 | 2008-09-25 | The Boeing Company | Composite laminate having a damping interlayer and method of making the same |
WO2009142906A3 (en) * | 2008-05-22 | 2010-02-04 | 3M Innovative Properties Company | Multilayer sound absorbing structure comprising mesh layer |
FR2939406A1 (en) * | 2008-12-05 | 2010-06-11 | Eurocopter France | Soundproofing trim panel for helicopter type rotorcraft, has core that is melamine self-extinguishing foam in which inserts are arranged, and skins provided with carbon cloth layers respectively |
FR2941647A1 (en) * | 2009-02-05 | 2010-08-06 | Aircelle Sa | ALVEOLAR HOOD STRUCTURE SUITABLE FOR USE IN A STRUCTURING PANEL FOR AN AIRCRAFT NACELLE |
CN102056794A (en) * | 2008-06-10 | 2011-05-11 | 空中客车作业有限公司 | Aircraft system carrier element |
US8079443B2 (en) | 2008-01-07 | 2011-12-20 | Pelzer Acoustic Products Gmbh | Aircraft trim panel with integrated adjustable acoustic properties |
US8371419B2 (en) | 2008-04-22 | 2013-02-12 | 3M Innovative Properties Company | Hybrid sound absorbing sheet |
US8425710B2 (en) | 2009-03-13 | 2013-04-23 | The Boeing Company | Automated placement of vibration damping materials |
US8469145B2 (en) | 2008-04-14 | 2013-06-25 | 3M Innovative Properties Company | Multilayer sound absorbing sheet |
US8499887B2 (en) * | 2008-04-04 | 2013-08-06 | Airbus Deutschland Gmbh | Acoustically optimized cabin wall element |
WO2014140453A1 (en) | 2013-03-11 | 2014-09-18 | CHERMANT, Alexis | Structural material core based on profiled elements, structural material and manufacturing method |
AT520393A1 (en) * | 2017-06-19 | 2019-03-15 | Art Anno Gmbh | Sound absorption element |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110100747A1 (en) * | 2006-05-24 | 2011-05-05 | Airbus Operations Gmbh | Sandwich element for the sound-absorbing inner cladding of means of transport, especially for the sound-absorbing inner cladding of aircraft |
CN101819767A (en) * | 2010-03-12 | 2010-09-01 | 陈业新 | Plate for noise barrier and manufacturing method thereof |
CN101906829A (en) * | 2010-08-20 | 2010-12-08 | 王占清 | Foamed aluminum noise-reducing acoustic board and application thereof |
EP2610052A1 (en) * | 2011-12-30 | 2013-07-03 | AGUSTAWESTLAND S.p.A. | Aircraft interior trim panel, and aircraft fitted with such panels |
CN103161391A (en) * | 2013-03-07 | 2013-06-19 | 苏州市江诚人防设备有限公司 | Inorganic protective door |
US20150030803A1 (en) * | 2013-07-29 | 2015-01-29 | The Boeing Company | Composite Laminates Having Hole Patterns Produced by Controlled Fiber Placement |
CN107240389A (en) * | 2017-06-13 | 2017-10-10 | 黄晓敏 | A kind of sound sensing device for wearable device |
CN112638718A (en) * | 2018-10-26 | 2021-04-09 | MT-Tec合同会社 | Sound insulation material for automobile |
CN109989364A (en) * | 2019-05-10 | 2019-07-09 | 深圳市双禹王声屏障工程技术有限公司 | A kind of compoiste sound-absorbing board |
US20230048280A1 (en) * | 2021-08-16 | 2023-02-16 | The Boeing Company | Sound absorbing structures |
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US4235303A (en) * | 1978-11-20 | 1980-11-25 | The Boeing Company | Combination bulk absorber-honeycomb acoustic panels |
DE3913255A1 (en) * | 1989-04-22 | 1990-10-25 | Brigitte Schmelzle | Sound-absorbing ceiling cladding panel - has perforated stiffening plate glued to rear of honeycomb grille of corrugated strips |
EP0747285A1 (en) * | 1995-06-09 | 1996-12-11 | AEROSPATIALE SOCIETE NATIONALE INDUSTRIELLE, Société Anonyme | Sandwich panel using a composite material and method of making it |
EP0935235A2 (en) * | 1998-02-06 | 1999-08-11 | EUROCOPTER DEUTSCHLAND GmbH | Sandwich-type wall |
FR2859229A1 (en) * | 2003-08-29 | 2005-03-04 | Gravicolor | Wall, floor or ceiling sound insulation material has inner layer with cellular structure and outer layer of mineral granules and resins |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100322253B1 (en) * | 1998-06-02 | 2002-05-13 | 위성갑 | Panel for honeycomb-foam aluminum soundproof wall |
US7320739B2 (en) * | 2003-01-02 | 2008-01-22 | 3M Innovative Properties Company | Sound absorptive multilayer composite |
-
2006
- 2006-05-30 BR BRPI0621653-6A patent/BRPI0621653A2/en not_active IP Right Cessation
- 2006-05-30 US US12/227,841 patent/US20100247848A1/en not_active Abandoned
- 2006-05-30 JP JP2009512417A patent/JP2009538746A/en active Pending
- 2006-05-30 WO PCT/EP2006/005161 patent/WO2007137607A1/en active Application Filing
- 2006-05-30 CN CNA2006800547854A patent/CN101448700A/en active Pending
- 2006-05-30 EP EP06753991A patent/EP2021237A1/en not_active Withdrawn
- 2006-05-30 CA CA002651742A patent/CA2651742A1/en not_active Abandoned
Patent Citations (5)
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US4235303A (en) * | 1978-11-20 | 1980-11-25 | The Boeing Company | Combination bulk absorber-honeycomb acoustic panels |
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EP0747285A1 (en) * | 1995-06-09 | 1996-12-11 | AEROSPATIALE SOCIETE NATIONALE INDUSTRIELLE, Société Anonyme | Sandwich panel using a composite material and method of making it |
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US8079443B2 (en) | 2008-01-07 | 2011-12-20 | Pelzer Acoustic Products Gmbh | Aircraft trim panel with integrated adjustable acoustic properties |
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FR2939406A1 (en) * | 2008-12-05 | 2010-06-11 | Eurocopter France | Soundproofing trim panel for helicopter type rotorcraft, has core that is melamine self-extinguishing foam in which inserts are arranged, and skins provided with carbon cloth layers respectively |
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US9108385B2 (en) | 2009-02-05 | 2015-08-18 | Aircelle | Honeycomb core structure for use in a structural panel for a jet engine nacelle |
US8425710B2 (en) | 2009-03-13 | 2013-04-23 | The Boeing Company | Automated placement of vibration damping materials |
US9199442B2 (en) | 2009-03-13 | 2015-12-01 | The Boeing Company | Automated placement of vibration damping materials |
WO2014140453A1 (en) | 2013-03-11 | 2014-09-18 | CHERMANT, Alexis | Structural material core based on profiled elements, structural material and manufacturing method |
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AT520393B1 (en) * | 2017-06-19 | 2019-09-15 | Art Anno Gmbh | Sound absorption element |
Also Published As
Publication number | Publication date |
---|---|
BRPI0621653A2 (en) | 2011-12-20 |
CA2651742A1 (en) | 2007-12-06 |
EP2021237A1 (en) | 2009-02-11 |
US20100247848A1 (en) | 2010-09-30 |
JP2009538746A (en) | 2009-11-12 |
CN101448700A (en) | 2009-06-03 |
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