EP0750777A1 - Folien-schallabsorber - Google Patents
Folien-schallabsorberInfo
- Publication number
- EP0750777A1 EP0750777A1 EP95912132A EP95912132A EP0750777A1 EP 0750777 A1 EP0750777 A1 EP 0750777A1 EP 95912132 A EP95912132 A EP 95912132A EP 95912132 A EP95912132 A EP 95912132A EP 0750777 A1 EP0750777 A1 EP 0750777A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sound absorber
- film
- absorber according
- foil sound
- foil
- 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
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 film absorber for absorbing sound
- the oscillation amplitude of the plate becomes particularly large at the natural frequencies ".
- This resonance-like resonance of the partial surfaces with their characteristic bending vibrations meant that high damping of the stimulating sound waves could be achieved at least in the vicinity of a natural frequency even if the internal damping remained relatively low but the deformation of the film material was severe.
- attempts have been made (“sound absorbing component” - DE 29 21 050, "sound absorbing component” - DE 32 33 654)
- PVC has in common with many other plastics that - even when used indoors - it is not permanently UV-resistant and therefore discoloration can occur. For reasons of environmental protection, the market is reacting cautiously to all PVC products today. In some countries, the use of PVC in large quantities in buildings is also prohibited for reasons of fire protection.
- the object of the invention is therefore to provide a film absorber which is simple to manufacture and easy to clean. According to the invention, this is done by the photo lienabsorber solved according to claim 1. Advantageous refinements are characterized in the subclaims.
- the film absorber according to the invention completely avoids the cup-shaped formations and consists only of several (preferably: 3) completely flat films which are arranged one behind the other (preferably: all parallel to one another and to the wall) in front of a reverberant rear wall (for example a very heavy component) are.
- the foils can be made of any material, e.g. Plastic or metal. Your transverse dimensions are largely, e.g. according to the respective installation case, freely selectable. 2, their acoustic properties are essentially determined by their basis weights m "and distances D from one another and from the wall.
- the shape and configuration of the between the films and the wall play, at least in the case of perpendicular sound
- the voids formed and the type of fastening of the foils to spacers or frames for fastening the absorbers to the rear wall play only a subordinate role in terms of sound technology, since the absorber according to the invention does not essentially derive its effectiveness from the internal damping in the foil material by stimulating bending deformations at kinks , Edges and supports and hardly derived from the friction between contact surfaces or from the friction of vibrating air particles on fine fibers or in narrow pores, it enables a previously unsuitable adaptation of the acoustic design to the respective input in terms of material selection and shape When designing for the same sound spectrum, it requires approximately the same depth and basis weight as the known film absorbers.
- the film absorber according to the invention according to Figure 2 is, like that according to DE 27 58 041, DE 29 21 050 or DE 32 33 654, a complex resonance system. With its low resistance, similar to the conventional film absorber (see Fuchs, HV; Ackermann, U .; Frommhold, W .: Development of non-porous absorbers for technical sound insulation. Building Physics 1 1 (1 989), p. 28-36), it enables unexpected broadband activity even with a relatively small number of resonance mechanisms (preferably: 3).
- Figure 3 shows the simplest example of a resonance system constructed from only a single film, an important optimization principle of the absorbers according to the invention.
- the film For broadband attenuation at high frequencies, the film should have the lowest possible basis weight m "and not (for larger m") prefer a correspondingly smaller distance. In order to optimally absorb at low frequencies, however, not only the basis weight should be increased, but also the thickness D of the air cushion at the same time. In this way it can be achieved that the simplest single-shell structure for low frequencies needs a significantly smaller depth than a homogeneously constructed porous or fibrous absorber.
- Figure 5 shows a calculation result for three foils of the same weight with a total depth of 100 mm.
- the comparison with measurements in the so-called impedance tube with a cross-section of 200 x 200 mm ⁇ shows very good agreement up to the measuring limit of 1 200 Hz ( Figure 6).
- the film absorbers according to the invention can be made absorbent by means of staggered mass / spring systems consisting of thin films with air spaces with almost any broadband absorption, in particular if (as seen in the direction of sound incidence) the basis weights m "of the films are increased and the distances D also enlarged between them towards the wall.
- the cavity resonator which is formed by the film 1, the side frames 2 or spacers and the rear wall R, is advantageously gas-tight.
- the film absorber according to the invention can be designed to be acoustically broadband and to be manufactured significantly more cost-effectively and, because of the closed surface, it is more maintenance-friendly.
- the flat, completely flat and smooth construction of the film absorber according to the invention offers significant advantages with regard to deposits and cleaning.
- the flat film absorber can be manufactured significantly more simply and cost-effectively.
- the film absorber according to the invention can be configured as desired, similarly to silencers made of homogeneous mineral wool, and can be modularly constructed, preferably together with the hard-walled rear wall, as a sound-absorbing component with the Create the required stiffness in freely selectable dimensions.
- a water-impermeable, thin cloth can be obtained as the first film facing the room.
- a particularly resistant variant can also use novel, extremely tear-resistant, thin plastic fabric as the first film.
- the film absorber according to the invention offers a variety hitherto unknown for sound absorbers, which accommodates its use in room acoustics.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Laminated Bodies (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI9530271T SI0750777T1 (en) | 1994-03-15 | 1995-03-13 | Foil sound absorber |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4408782 | 1994-03-15 | ||
DE4408782A DE4408782A1 (de) | 1994-03-15 | 1994-03-15 | Folien-Schallabsorber |
PCT/DE1995/000341 WO1995025325A1 (de) | 1994-03-15 | 1995-03-13 | Folien-schallabsorber |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0750777A1 true EP0750777A1 (de) | 1997-01-02 |
EP0750777B1 EP0750777B1 (de) | 1999-07-28 |
Family
ID=6512853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95912132A Expired - Lifetime EP0750777B1 (de) | 1994-03-15 | 1995-03-13 | Folien-schallabsorber |
Country Status (8)
Country | Link |
---|---|
US (1) | US5750944A (de) |
EP (1) | EP0750777B1 (de) |
JP (1) | JPH09510303A (de) |
AT (1) | ATE182713T1 (de) |
DE (2) | DE4408782A1 (de) |
ES (1) | ES2135712T3 (de) |
GR (1) | GR3031089T3 (de) |
WO (1) | WO1995025325A1 (de) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19626676A1 (de) * | 1996-07-03 | 1998-01-08 | Kaefer Isoliertechnik | Vorrichtung zur Verminderung von Schallpegeln in Gebäuden |
DE29617845U1 (de) * | 1996-10-14 | 1998-02-12 | M. Faist GmbH & Co. KG, 86381 Krumbach | Einrichtung zum Absorbieren und/oder Dämpfen von Schallwellen |
DE29815712U1 (de) * | 1997-09-04 | 1999-04-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eV, 80636 München | Schallabsorber |
DE19750102A1 (de) | 1997-11-12 | 1999-06-02 | Stankiewicz Gmbh | Gasdurchströmte Leitung mit Schallabsorptionswirkung |
DE19754107C1 (de) | 1997-12-05 | 1999-02-25 | Fraunhofer Ges Forschung | Schallabsorber |
EP0978600A3 (de) | 1998-08-07 | 2001-01-17 | KAEFER Isoliertechnik GmbH & Co. KG | Schalldämpfungsmittel |
DE19901607C2 (de) * | 1998-08-07 | 2001-03-08 | Kaefer Isoliertechnik | Schalldämpfungsmittel |
ES2211586T3 (es) * | 1999-08-11 | 2004-07-16 | HP-CHEMIE PELZER RESEARCH & DEVELOPMENT LTD. | Componente con alto efecto de absorcion sobre un amplio intervalo de frecuencia. |
DE19944474C2 (de) * | 1999-09-16 | 2001-10-31 | Infineon Technologies Ag | Abschirmung äußerer Anregungen bei der Vermessung schwingungsfähiger Halbleitermembranen |
DE10037001B4 (de) * | 2000-07-29 | 2004-06-09 | Carl Heinz Niemeyer | Schalldämpfungselement für Strömungsmittel |
JP4050632B2 (ja) * | 2003-02-24 | 2008-02-20 | 株式会社神戸製鋼所 | 吸音構造体 |
JP2004264374A (ja) * | 2003-02-24 | 2004-09-24 | Kobe Steel Ltd | 薄膜を用いた吸音構造 |
DE102005002621B3 (de) * | 2005-01-20 | 2006-06-14 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Hermetisch abgeschlossenes Modul zur Schalldämpfung |
JP2010085818A (ja) * | 2008-10-01 | 2010-04-15 | Inoac Corp | 吸音材 |
JP5632595B2 (ja) * | 2009-08-14 | 2014-11-26 | リケンテクノス株式会社 | 吸音体および吸音構造 |
JP2011039357A (ja) * | 2009-08-14 | 2011-02-24 | Riken Technos Corp | 吸音体および吸音構造 |
JP2011039355A (ja) * | 2009-08-14 | 2011-02-24 | Riken Technos Corp | 吸音体および吸音構造 |
FR2970009B1 (fr) * | 2010-12-30 | 2021-06-11 | Normalu | Ensemble acoustiquement absorbant |
CN102820029B (zh) * | 2012-08-24 | 2014-06-18 | 广州市泰力高复合材料有限公司 | 一种消音结构 |
CA2911672A1 (en) * | 2013-05-08 | 2014-11-13 | Hervey Tremblay | Acoustic insulating panel |
MX2017007298A (es) * | 2014-12-05 | 2017-08-25 | Eleda S R L | Sistema y elemento de absorcion del sonido. |
USD895158S1 (en) | 2018-04-13 | 2020-09-01 | Caimi Brevetti S.P.A. | Sound absorbing panel |
USD894429S1 (en) | 2018-04-13 | 2020-08-25 | Caimi Brevetti S.P.A. | Sound absorbing panel |
USD895159S1 (en) | 2018-04-13 | 2020-09-01 | Caimi Brevetti S.P.A. | Sound absorbing panel |
CN112639960A (zh) * | 2018-09-14 | 2021-04-09 | MT-Tec合同会社 | 汽车用吸音材料 |
DE102021114238A1 (de) | 2021-06-01 | 2022-12-01 | Allgaier Werke Gmbh | Schallabsorber für industrielle Maschinen |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2921050A1 (de) * | 1979-05-23 | 1980-11-27 | Fraunhofer Ges Forschung | Schallabsorbierendes bauelement aus kunststoff-folie |
DE2758041C2 (de) * | 1977-12-24 | 1985-10-31 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Verwendung eines aus mindestens zwei übereinander angeordneten Folien, insbesondere Kunststoffolien, bestehenden Bauelements |
DE3032269A1 (de) * | 1980-08-27 | 1982-04-08 | Hoechst Ag, 6000 Frankfurt | Resonatorschallabsorptionselement |
DE3233654C2 (de) * | 1982-09-10 | 1986-01-16 | Ewald Dörken AG, 5804 Herdecke | Schallabsorbierendes Bauelement |
DE3404208A1 (de) * | 1984-02-07 | 1985-08-08 | Siemens AG, 1000 Berlin und 8000 München | Magnetplattenspeicher mit in einem federnd ausgebildeten gehaeuse beidseitig gelagerten plattenstapel |
DE3408411A1 (de) * | 1984-03-08 | 1985-09-19 | Rütgerswerke AG, 6000 Frankfurt | Selbstklebendes entdroehnungselement |
US4607466A (en) * | 1984-05-29 | 1986-08-26 | Allred John C | Method and apparatus for controlling reverberation of sound in enclosed environments |
DE3504208A1 (de) * | 1985-02-07 | 1986-08-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Schalldaempfer-box |
US4832147A (en) * | 1987-06-19 | 1989-05-23 | E. I. Dupont De Nemours And Company | Sound reduction membrane |
FR2640068B1 (fr) * | 1988-12-07 | 1991-01-25 | Cnim | Procede de fabrication de structures composites pour l'absorption du bruit et structures composites obtenues par ledit procede |
DE8903942U1 (de) * | 1989-03-31 | 1989-05-24 | HDW-Isoliertechnik GmbH, 24149 Kiel | Isolierstoffplatte |
DE4123509C2 (de) * | 1991-07-16 | 1993-10-07 | Continental Ag | Elastische Entdröhnbelagsbahn für Wände von schallabgebenden Gehäusen und seine Verwendung |
DE9301234U1 (de) * | 1992-02-20 | 1993-03-18 | Lydall Gerhardi GmbH & Co.KG, 58511 Lüdenscheid | Wärme- und Schallisolationsformteil |
-
1994
- 1994-03-15 DE DE4408782A patent/DE4408782A1/de not_active Withdrawn
-
1995
- 1995-03-13 US US08/704,715 patent/US5750944A/en not_active Expired - Fee Related
- 1995-03-13 DE DE59506479T patent/DE59506479D1/de not_active Expired - Fee Related
- 1995-03-13 JP JP7523775A patent/JPH09510303A/ja active Pending
- 1995-03-13 EP EP95912132A patent/EP0750777B1/de not_active Expired - Lifetime
- 1995-03-13 WO PCT/DE1995/000341 patent/WO1995025325A1/de active IP Right Grant
- 1995-03-13 ES ES95912132T patent/ES2135712T3/es not_active Expired - Lifetime
- 1995-03-13 AT AT95912132T patent/ATE182713T1/de not_active IP Right Cessation
-
1999
- 1999-08-26 GR GR990402172T patent/GR3031089T3/el unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9525325A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE182713T1 (de) | 1999-08-15 |
DE4408782A1 (de) | 1995-09-21 |
JPH09510303A (ja) | 1997-10-14 |
GR3031089T3 (en) | 1999-12-31 |
DE59506479D1 (de) | 1999-09-02 |
ES2135712T3 (es) | 1999-11-01 |
EP0750777B1 (de) | 1999-07-28 |
US5750944A (en) | 1998-05-12 |
WO1995025325A1 (de) | 1995-09-21 |
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