EP1406792A1 - Schallabschirmelement - Google Patents
SchallabschirmelementInfo
- Publication number
- EP1406792A1 EP1406792A1 EP02764576A EP02764576A EP1406792A1 EP 1406792 A1 EP1406792 A1 EP 1406792A1 EP 02764576 A EP02764576 A EP 02764576A EP 02764576 A EP02764576 A EP 02764576A EP 1406792 A1 EP1406792 A1 EP 1406792A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- element according
- sound
- partitions
- chambers
- 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.)
- Granted
Links
- 238000005192 partition Methods 0.000 claims abstract description 28
- -1 aluminum-polypropylene Chemical group 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims 7
- 229920006255 plastic film Polymers 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 235000015115 caffè latte Nutrition 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013039 cover film Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- 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
- E04B2001/8457—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
- E04B2001/8485—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the opening being restricted, e.g. forming Helmoltz resonators
-
- 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 sound shielding element with at least one plate having many small openings, according to the preamble of claim 1.
- Such sound shielding elements which are used, for example, to protect against sound propagation from the noise area of a room into a neighboring room and / or to cover sound-reflecting or sound-generating components, are already known (WO 00/68039).
- the dimensioning of the mean diameter or of the small openings formed as holes, slots or the like is just as important as the proportion of the area which has such openings on the entire surface of the sound shielding element.
- This so-called “perforated area ratio”, like the average diameter or the width of the perforations, should be very small. Perforated area ratios between 0.01% and 10% and average diameter or width of the perforations between 0.01 mm and 1 mm are preferred.
- the invention has for its object to further improve sound shielding elements of the type mentioned in terms of their sound absorption in the simplest possible manner and with low manufacturing costs.
- the chambers are preferably rectangular in cross section, so that the partitions each run in a substantially straight plane, which greatly facilitates the production of large-area sound shielding elements.
- the partitions can also be honeycomb-shaped or be formed by tube pieces placed against one another.
- the chambers should have a clear width between 10 mm and 300 mm.
- the partitions should be as thin as possible; wall thicknesses between 0.5 mm and 3 mm are recommended.
- Polypropylene is particularly recommended as the material for the partition walls in a cased underbody paneling of motor vehicles.
- metals e.g. B. Aluminum, advantageous for the partitions.
- a perforation area ratio of between 1% and 8% is particularly preferred for the plate and the average diameter or the width of the small openings should be between 0.05 mm and 1 mm.
- the system of chambers and partitions should connect to a rear wall on the side facing away from the plate; this can also be designed as a plate. The back wall can also be missing.
- the chambers are preferably filled with air. It is assumed that the air vibrations behind the "perforated plate” provided with small openings, in particular small circular holes, are influenced by the partition walls arranged as "transverse walls” in such a way that a considerably larger proportion of "sound energy” is dampened in the microperforated plate in front of it ,
- Figure 1 is a schematic partial view (partially torn) of a sound shielding element according to the invention.
- Figures 2 and 3 curves for the equivalent absorption area in m 2 depending on the measurement frequency f in Hz.
- a system 3 of chambers 4 is arranged behind the plate 1, which is provided with small openings 2, which are formed by partitions 5 which extend orthogonally to the plate 1.
- the chambers 4 are d in this example in cross section quite angular, in particular square, with a width B and a depth T. between the back of the plate 1 and the rear wall 6, which may also consist of a plate. However, this rear wall can also be omitted, which surprisingly hardly changes the absorption behavior.
- the partition walls 5 have the smallest possible wall thickness S, which above all has to ensure sufficient stability of the, in particular, self-supporting chamber system A of “cassettes”.
- the wall thickness d of the plate 1 is approximately 2 mm. Hole diameters D of 0.8 mm are used and the hole area ratio, i.e. H. the proportion of the area occupied by the holes in the total area of the plate 1 is 0.5%.
- the chamber system 3 has a depth T of 30 mm.
- the chamber or partition walls 5 with a wall thickness S of 2 mm are made of polypropylene.
- the plate 1 consists of transparent injection molding; it has a wall thickness d of 2 mm.
- the chambers 4 have the height H and the width B.
- the dimension of the entire measured arrangement is 1 ⁇ 200 mm x 800 mm
- FIG. 3 shows the dependence of the absorption curve on the “degree of cassette” with the same cassette measures as in the previous example, if a high-frequency tuning of the microperforation is selected.
- the distance ie the depth T
- T 20 mm
- the cassette can achieve a significant improvement in absorption, even if the percentage increase is not as great as with deep tuning.
- the sound shielding element can be manufactured by, for example, the following preferred manufacturing processes in such a way that the partitions forming the chambers form a mechanical structural unit with the plate or layer covering the chambers:
- thermoplastic plastic film is heated from a heating field and then pulled, in particular by means of vacuum, into a deep-drawing tool forming the chambers.
- the film clings to the chamber contour and hardens by cooling.
- the perforations can be made by perforating the chamber bottoms that form the plate or layer using needle fields. This is either still possible in the deep-drawing tool or even after demolding.
- a corresponding blowing process can also be used, in which the thermoplastic plastic film is pressed against the contour of the shaping blow molding tool by the blowing pressure.
- Nonwovens, foams, foils or plastic masses are pressed into a chamber structure.
- Cold pressing of thermally heated thermoplastic materials or hot pressing of thermosetting materials is possible.
- the perforations can Per f orieren subsequently a g e b racht be either in the pressing tool itself or.
- This can be a thin fleece application which has an average opening proportion and an average opening diameter, which correspond to the design rules for the openings of the preamble of claim 1.
- a component integrating the plate or the layer on the one hand and the partition walls of the chamber on the other hand can also be produced by casting, injection molding, injection molding or injection molding. It is also recommended to use the same material for the plate and partitions.
- the partition walls with the chamber structure in particular polypropylene, are injection molded onto a perforated, in particular needle-rolled, film made of polypropylene, in particular an aluminum polypropylene composite layer.
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Multimedia (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Laminated Bodies (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10134783A DE10134783B4 (de) | 2001-07-17 | 2001-07-17 | Schallabschirmelement |
DE10134783 | 2001-07-17 | ||
PCT/EP2002/006106 WO2003008237A1 (de) | 2001-07-17 | 2002-06-04 | Schallabschirmelement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1406792A1 true EP1406792A1 (de) | 2004-04-14 |
EP1406792B1 EP1406792B1 (de) | 2004-11-24 |
Family
ID=7692123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02764576A Revoked EP1406792B1 (de) | 2001-07-17 | 2002-06-04 | Schallabschirmelement |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1406792B1 (de) |
AT (1) | ATE283181T1 (de) |
DE (2) | DE10134783B4 (de) |
ES (1) | ES2235081T3 (de) |
WO (1) | WO2003008237A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007302243A (ja) * | 2007-07-09 | 2007-11-22 | Kobe Steel Ltd | 枠体付き二重壁構造体 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010029409B4 (de) | 2010-05-27 | 2019-12-12 | Röchling Automotive AG & Co. KG | Thermische Kfz-Funktionsraumverkleidung |
WO2013169788A2 (en) * | 2012-05-07 | 2013-11-14 | 3M Innovative Properties Company | Acoustic damping device and installation |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1352581A (fr) * | 1963-04-03 | 1964-02-14 | Dalle d'insonorisation en des matières synthétiques à l'état de mousse, et procédé de fabrication de cette dalle | |
DE1264021B (de) * | 1962-12-01 | 1968-03-21 | Gruenzweig & Hartmann A G | Schalldaemmende Wandung |
DE2408028B2 (de) * | 1974-02-20 | 1978-05-11 | Fa. Carl Freudenberg, 6940 Weinheim | Schallschluckplatte |
GB2038410B (en) * | 1978-12-27 | 1982-11-17 | Rolls Royce | Acoustic lining utilising resonance |
CH683855A5 (de) * | 1991-07-24 | 1994-05-31 | Zdzislaw Pregowski | Schallabsorptionsplatte. |
DE29509301U1 (de) | 1995-06-07 | 1995-11-02 | Bantle, Helmut, 78727 Oberndorf | Schneidgerät für Maultaschen |
CH692731A5 (de) * | 1998-01-09 | 2002-10-15 | Rieter Automotive Int Ag | Ultraleichter, schall- und schockabsorbierender Bausatz. |
DE29803674U1 (de) * | 1998-03-03 | 1999-07-15 | M. Faist GmbH & Co. KG, 86381 Krumbach | Schichtstoff |
WO2000068039A1 (de) * | 1999-05-06 | 2000-11-16 | Faist Automotive Gmbh & Co. Kg | Schallabschirmelement, verwendung desselben und verfahren zu dessen herstellung |
-
2001
- 2001-07-17 DE DE10134783A patent/DE10134783B4/de not_active Expired - Fee Related
-
2002
- 2002-06-04 WO PCT/EP2002/006106 patent/WO2003008237A1/de not_active Application Discontinuation
- 2002-06-04 ES ES02764576T patent/ES2235081T3/es not_active Expired - Lifetime
- 2002-06-04 DE DE50201635T patent/DE50201635D1/de not_active Revoked
- 2002-06-04 EP EP02764576A patent/EP1406792B1/de not_active Revoked
- 2002-06-04 AT AT02764576T patent/ATE283181T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO03008237A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007302243A (ja) * | 2007-07-09 | 2007-11-22 | Kobe Steel Ltd | 枠体付き二重壁構造体 |
Also Published As
Publication number | Publication date |
---|---|
WO2003008237A1 (de) | 2003-01-30 |
DE50201635D1 (de) | 2004-12-30 |
ATE283181T1 (de) | 2004-12-15 |
EP1406792B1 (de) | 2004-11-24 |
DE10134783A1 (de) | 2003-02-13 |
DE10134783B4 (de) | 2005-09-15 |
ES2235081T3 (es) | 2005-07-01 |
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