EP0236810A2 - Absorbing sound-damping structure - Google Patents
Absorbing sound-damping structure Download PDFInfo
- Publication number
- EP0236810A2 EP0236810A2 EP87102341A EP87102341A EP0236810A2 EP 0236810 A2 EP0236810 A2 EP 0236810A2 EP 87102341 A EP87102341 A EP 87102341A EP 87102341 A EP87102341 A EP 87102341A EP 0236810 A2 EP0236810 A2 EP 0236810A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- support structure
- absorption
- absorption material
- backdrop
- 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
- 238000013016 damping Methods 0.000 title abstract description 4
- 238000010521 absorption reaction Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 19
- 230000003584 silencer Effects 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 10
- 238000003475 lamination Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
Definitions
- the invention relates to an absorption silencer backdrop, the absorption material of which is held down by a support structure, this support structure being laminated on its side facing away from the absorption material by a film.
- the silencer baffles according to the invention are suitable for damping sound waves in flowing gases containing moist dust which tends to stick.
- the object of the present invention was to dampen the sound waves in a moist and dusty flowing gas in a wide frequency range. Another object of the present invention was to dampen the sound waves in a damp gas containing sticky dust without reducing the effectiveness of the muffler due to deposits on the muffler or due to the wear through of the lamination with incrustation of external support devices is reduced by relative movement between the film and the support device.
- the absorption silencer backdrop according to the invention is, as is customary in the case of such backdrops, held by a profile frame which can be made, for example, of metal, such as steel or aluminum, or of plastic.
- the usual precautions can be taken on the profile frame to facilitate the assembly and sealing of the silencer link at the place of action; it can contain, for example, bores with or without threads, mounting brackets, rails, seals, such as, for example, rubber-elastic or spring-elastic sealing lips.
- the absorption material which usually consists of stone, mineral or glass wool; other absorption materials are conceivable, but mostly less inexpensive. The absorption material is held down by the support structure mentioned.
- a film is firmly connected to the support structure.
- This film can be glued to the support structure.
- the laminating film and the support structure can also consist of one piece;
- the laminating film can be provided with a support structure from the outset during its manufacturing process, for example with ribs and the like. If the latter is the case, it is preferred that the laminating film is provided on only one side with the support structure, namely on the side facing away from the gas side.
- the support structure should not only hold down the absorbent material, it also has the task of the lamination film with the it is firmly connected to give sufficient hold, for example to prevent destruction by excessive fluttering of the film at high flow velocities of the gas in which the sound waves are to be damped. Limited movements of the film for self-cleaning and acoustic transparency are desirable.
- the support structure can consist of the same material as the laminating film, but it can also consist of one or more other materials. Examples of usable materials are metals and their alloys, such as. As aluminum, aluminum alloy such as duralumin and steels, and their mixtures.
- the support structure can, for example, have the shape of a perforated plate, a grid or one or more strips or ribs.
- the support structure should only cover a small proportion of the inner surface of the film. If it is not provided with a support structure during its production process, the laminating film can, for example, be glued, welded or sintered onto the support structure. In order to achieve good sound absorption, the laminating film must be largely transparent to the sound waves to be damped.
- the laminating film can be a thin metal film, but it can also consist of plastic, for example polyethylene, PVC or PTFE. When choosing the suitable material, the temperature and the chemical behavior of the gases in which the sound is to be damped must be taken into account.
- the film should be essentially smooth on the gas side so as not to promote the agglomeration of sticky particles on its surface.
- the film should only be firmly connected to the support structure with a small part of its surface facing away from the gas side.
- the Foil coated on the gas side or chemically or physically modified, for example to increase their corrosion resistance or their anti-adhesion effect.
- the film 1 is an approximately 50 ⁇ m thick PTFE film.
- the film is attached to a 3 mm thick perforated plate 2 made of PVC using a silicone adhesive.
- the absorption silencer backdrop has the outer dimensions 1000 mm x 1000 mm.
- Each of the two perforated plates has 52 circular openings 5 of 118 mm in diameter.
- the absorption material 4 consists of mineral wool, the backdrop frame 3 made of aluminum.
- the perforated plates are connected to the backdrop frame by rivets, the joints are sealed with sealing compound.
- the insertion loss of silencers (cf. VDI 2567) with the described scenes corresponds to the insertion loss of silencers with scenes, the absorption material of which is covered with a similar film, but is held on the outside by a grille.
- the backdrop described was used for 2 1/2 years in moist air containing PVC dust or the like. Flow rate operated. There was no significant dust deposit on the backdrop. The insertion loss did not change.
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)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Die Erfindung betrifft eine Absorptionsschalldämpferkulisse, deren Absorptionsmaterial durch eine Stützkonstruktion niedergehalten wird, wobei diese Stützkonstruktion an ihrer dem Absorptionsmaterial abgewandten Seite durch eine Folie kaschiert ist. Die erfindungsgemäßen Schalldämpferkulissen sind für die Dämpfung von Schallwellen in zum Kleben neigenden Feuchtstaub enthaltenden strömenden Gasen geeignet.The invention relates to an absorption silencer backdrop, the absorption material of which is held down by a support structure, this support structure being laminated on its side facing away from the absorption material by a film. The silencer baffles according to the invention are suitable for damping sound waves in flowing gases containing moist dust which tends to stick.
Im Merkblatt "Relaxationsschalldämpfer-Elemente Typ F" vom 05. April 1980 der Firma G+H Montage, D-6700 Ludwigshafen sind Kulissen aus mit strukturierter Metallfolie kaschierten Mineralfaserplatten beschrieben, die eine hohe Dämmung im Frequenzbereich um 250 Hz haben. Auf Seite 2, mittlere Spalte dieses Merkblattes ist erwähnt, daß der Einsatz dieser Kulissen in feuchten oder staubhaltigen Medien möglich sei, "sofern die Staubbestandteile nicht zum Kleben neigen." Im Merkblatt "Relaxations-Schalldämpfer-Elemente Typ R" vom 06. November 1980, herausgegeben von der gleichen Firma wie o. g. Merkblatt, wird für den Einsatz bei feuchten und staubigen Medien die Abdeckung des Absorptionsmaterials durch Folie, die durch ein Drahtgitter niedergehalten wird, empfohlen.In the leaflet "Relaxation silencer elements type F" dated April 5, 1980 by G + H Montage, D-6700 Ludwigshafen, backdrops made of mineral fiber boards laminated with structured metal foil are described, which have high insulation in the frequency range around 250 Hz. On
Aufgabe der vorliegenden Erfindung war es, die Schallwellen in einem feuchten und staubigen strömenden Gas in einem weiten Frequenzbereich zu dämpfen. Eine weitere Aufgabe der vorliegenden Erfindung war es, die Schallwellen in einem feuchten, zum Kleben neigenden Staub enthaltenden Gas zu dämpfen, ohne daß die Wirksamkeit des Schalldämpfers aufgrund von Ablagerungen auf dem Schalldämpfer oder aufgrund des Durchscheuerns der Kaschierung bei Verkrustung außenliegender Stützeinrichtungen durch Relativbewegung zwischen Folie und Stützeinrichtung gemindert wird. Diese Aufgaben werden durch die vorliegende Erfindung dadurch gelöst, daß in der erfindungsgemäßen Absorptionsschalldämpferkulisse zwischen Absorptionsmaterial und Kaschierfolie eine Stützkonstruktion angebracht ist, die mit der Kaschierfolie fest verbunden ist.The object of the present invention was to dampen the sound waves in a moist and dusty flowing gas in a wide frequency range. Another object of the present invention was to dampen the sound waves in a damp gas containing sticky dust without reducing the effectiveness of the muffler due to deposits on the muffler or due to the wear through of the lamination with incrustation of external support devices is reduced by relative movement between the film and the support device. These objects are achieved by the present invention in that a support structure is attached between the absorption material and lamination film in the absorption silencer backdrop according to the invention, which is firmly connected to the lamination film.
Die erfindungsgemäße Absorptionsschalldämpferkulisse wird, wie bei solchen Kulissen üblich, von einem Profilrahmen gehalten, der beispielsweise aus Metall, wie Stahl oder Aluminium, oder aus Kunststoff bestehen kann. Am Profilrahmen können die üblichen Vorkehrungen getroffen sein, die die Montage und Abdichtung der Schalldämpferkulisse am Wirkungsort erleichtern; er kann beispielsweise Bohrungen mit oder ohne Gewinde, Montagelaschen, Schienen, Dichtungen, wie beispielsweise gummielastische oder federelastische Dichtungslippen enthalten. Innerhalb des Profilrahmens befindet sich das Absorptionsmaterial, das üblicherweise aus Stein-, Mineral- oder Glaswolle besteht; andere Absorptionsmaterialien sind denkbar, jedoch meist weniger preisgünstig. Das Absorptionsmaterial wird durch die genannte Stützkonstruktion niedergehalten. An der Gasseite der Stützkonstruktion, d. h. an der Seite, an der sich nach Einbau der Kulisse am Wirkort das strömende Gas befindet, dessen Schallwellen gedämpft werden sollen, ist eine Folie mit der Stützkonstruktion fest verbunden. Diese Folie kann auf die Stützkonstruktion geklebt sein. Die Kaschierfolie und die Stützkonstruktion können auch aus einem Stück bestehen; so kann die Kaschierfolie von vornherein während ihres Herstellungsprozesses mit einer Stützkonstruktion versehen sein, beispielsweise mit Rippen u. ä.. Ist letzteres der Fall, so wird bevorzugt, daß die Kaschierfolie nur einseitig mit der Stützkonstruktion versehen ist, nämlich auf der der Gasseite abgewandten Seite. Die Stützkonstruktion soll nicht nur das Absorptionsmaterial niederhalten, sie hat vielmehr auch die Aufgabe, der Kaschierfolie, mit der sie fest verbunden ist, ausreichenden Halt zu geben, beispielsweise um eine Zerstörung durch übermäßiges Flattern der Folie bei hohen Strömungsgeschwindigkeiten des Gases, in dem die Schallwellen gedämpft werden sollen, zu verhindern. Begrenzte Bewegungen der Folie zwecks Selbstreinigung und akustischer Transparenz sind erwünscht. Die Stützkonstruktion kann aus dem selben Material wie die Kaschierfolie bestehen, sie kann aber auch aus einem oder mehreren anderen Materialien bestehen. Beispiele für verwendbare Materialien sind Metalle und deren Legierungen, wie z. B. Aluminium, Aluminiumlegierung, wie Duraluminium und Stähle, sowie deren Mischungen. Die Stützkonstruktion kann beispielsweise die Form einer Lochplatte, eines Gitters oder eines oder mehrerer Leisten oder Rippen haben. Die Stützkonstruktion sollte nur einen geringen Anteil der Folieninnenfläche abdecken. Sofern sie nicht während ihres Herstellungsprozesses mit einer Stützkonstruktion versehen ist, kann die Kaschierfolie beispielsweise mit der Stützkonstruktion verklebt, verschweißt sein oder aufgesintert sein. Um eine gute Schalldämpfung zu erzielen, muß die Kaschierfolie weitgehend transparent für die zu dämpfenden Schallwellen sein. Die Kaschierfolie kann eine dünne Metallfolie sein, sie kann aber auch aus Kunststoff, beispielsweise Polyethylen, PVC oder PTFE bestehen. Bei der Wahl des geeigneten Werkstoffs sind die Temperatur und das chemische Verhalten der Gase, in denen der Schall gedämpft werden soll, zu berücksichtigen. Die Folie sollte an der Gasseite im wesentlichen glatt sein, um die Agglomeration klebriger Teilchen an ihrer Oberfläche nicht zu begünstigen. Im gleichen Sinne sollten Unebenheiten an der Gasseite, etwa durch der Folie aufliegende Schrauben- oder Nieten- köpfe,vermieden werden. Damit die Schallwellen weitgehend ungehindert durch die Folie in das Absorptionsmaterial eindringen können, sollte die Folie nur mit einem geringen Teil ihrer von der Gasseite abgekehrten Fläche mit der Stützkonstruktion fest verbunden sein. Obwohl für die erfindungsgemäße Wirkung nicht erforderlich, kann die Folie an der Gasseite beschichtet oder chemisch oder physikalisch modifiziert sein, um beispielsweise ihre Korrosionsbeständigkeit oder ihre haftungsabweisende Wirkung zu erhöhen.The absorption silencer backdrop according to the invention is, as is customary in the case of such backdrops, held by a profile frame which can be made, for example, of metal, such as steel or aluminum, or of plastic. The usual precautions can be taken on the profile frame to facilitate the assembly and sealing of the silencer link at the place of action; it can contain, for example, bores with or without threads, mounting brackets, rails, seals, such as, for example, rubber-elastic or spring-elastic sealing lips. Inside the profile frame is the absorption material, which usually consists of stone, mineral or glass wool; other absorption materials are conceivable, but mostly less inexpensive. The absorption material is held down by the support structure mentioned. On the gas side of the support structure, that is to say on the side on which the flowing gas whose sound waves are to be damped is located after installation of the backdrop at the site of action, a film is firmly connected to the support structure. This film can be glued to the support structure. The laminating film and the support structure can also consist of one piece; Thus, the laminating film can be provided with a support structure from the outset during its manufacturing process, for example with ribs and the like. If the latter is the case, it is preferred that the laminating film is provided on only one side with the support structure, namely on the side facing away from the gas side. The support structure should not only hold down the absorbent material, it also has the task of the lamination film with the it is firmly connected to give sufficient hold, for example to prevent destruction by excessive fluttering of the film at high flow velocities of the gas in which the sound waves are to be damped. Limited movements of the film for self-cleaning and acoustic transparency are desirable. The support structure can consist of the same material as the laminating film, but it can also consist of one or more other materials. Examples of usable materials are metals and their alloys, such as. As aluminum, aluminum alloy such as duralumin and steels, and their mixtures. The support structure can, for example, have the shape of a perforated plate, a grid or one or more strips or ribs. The support structure should only cover a small proportion of the inner surface of the film. If it is not provided with a support structure during its production process, the laminating film can, for example, be glued, welded or sintered onto the support structure. In order to achieve good sound absorption, the laminating film must be largely transparent to the sound waves to be damped. The laminating film can be a thin metal film, but it can also consist of plastic, for example polyethylene, PVC or PTFE. When choosing the suitable material, the temperature and the chemical behavior of the gases in which the sound is to be damped must be taken into account. The film should be essentially smooth on the gas side so as not to promote the agglomeration of sticky particles on its surface. In the same sense, unevenness on the gas side, such as screw or rivet heads resting on the film, should be avoided. In order that the sound waves can penetrate the absorption material largely unhindered, the film should only be firmly connected to the support structure with a small part of its surface facing away from the gas side. Although not necessary for the effect according to the invention, the Foil coated on the gas side or chemically or physically modified, for example to increase their corrosion resistance or their anti-adhesion effect.
In der Zeichnung ist eine besondere Ausführungsform der erfindungsgemäßen Vorrichtung skizziert. Die Folie 1 ist eine ca. 50 um starke PTFE-Folie. Die Folie ist mittels eines Silikonklebers auf einer 3 mm starken Lochplatte 2 aus PVC befestigt. Die Absorptionsschalldämpferkulisse hat die Außenmaße 1000 mm x 1000 mm.
Jede der beiden Lochplatten besitzt 52 kreisrunde Öffnungen 5 von 118 mm Durchmesser. Das Absorptionsmaterial 4 besteht aus Mineralwolle, der Kulissenrahmen 3 aus Aluminium Die Lochplatten sind mit dem Kulissenrahmen durch Nieten verbunden, die Fugen mit Dichtmasse verschlossen.A special embodiment of the device according to the invention is outlined in the drawing. The film 1 is an approximately 50 μm thick PTFE film. The film is attached to a 3 mm thick
Each of the two perforated plates has 52
Die Einfügungsdämpfung von Schalldämpfern (vgl. VDI 2567) mit den beschriebenen Kulissen entspricht der Einfügungsdämpfung von Schalldämpfern mit Kulissen, deren AbsorptionsMaterial mit gleichartiger Folie abgedeckt, aber außen von einem Gitter gehalten wird.The insertion loss of silencers (cf. VDI 2567) with the described scenes corresponds to the insertion loss of silencers with scenes, the absorption material of which is covered with a similar film, but is held on the outside by a grille.
Die beschriebene Kulisse wurde 2 1/2 Jahre lang in feuchter, PVC-Staub enthaltender Luft o. g. Strömungsgeschwindigkeit betrieben. Es erfolgte keine nennenswerte Staubablagerung auf der Kulisse. Die Einfügungsdämpfung veränderte sich nicht.The backdrop described was used for 2 1/2 years in moist air containing PVC dust or the like. Flow rate operated. There was no significant dust deposit on the backdrop. The insertion loss did not change.
Claims (4)
daß zwischen Absorptionsmaterial und Kaschierfolie eine Stützkonstruktion angebracht ist, die mit der Kaschierfolie fest verbunden ist.1. absorption silencer backdrop consisting of absorption material, laminating film and profile frame, characterized in that
that a support structure is attached between the absorption material and lamination film, which is firmly connected to the lamination film.
daß die Stützkonstruktion aus einer mit Öffnungen versehenen Platte besteht.2. absorption silencer backdrop according to claim 1, characterized in
that the support structure consists of an apertured plate.
daß Kaschierfolie und Stützkonstruktion aus einem Stück hergestellt sind.3. absorption silencer backdrop according to claim 1, characterized in
that laminating film and support structure are made in one piece.
daß die Kaschierfolie an ihrer Außenseite glatt ist.4. absorption silencer backdrop according to claim 1, 2 or 3, characterized in
that the laminating film is smooth on the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87102341T ATE95935T1 (en) | 1986-02-21 | 1987-02-19 | ABSORPTION SILENCER. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3605684A DE3605684C2 (en) | 1986-02-21 | 1986-02-21 | Absorption silencer backdrop |
| DE3605684 | 1986-02-21 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0236810A2 true EP0236810A2 (en) | 1987-09-16 |
| EP0236810A3 EP0236810A3 (en) | 1988-01-27 |
| EP0236810B1 EP0236810B1 (en) | 1993-10-13 |
Family
ID=6294675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87102341A Expired - Lifetime EP0236810B1 (en) | 1986-02-21 | 1987-02-19 | Absorbing sound-damping structure |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0236810B1 (en) |
| AT (1) | ATE95935T1 (en) |
| DE (2) | DE3605684C2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0531698A2 (en) * | 1991-09-12 | 1993-03-17 | Luwa Aktiengesellschaft | Sound-damping screen and cassette for sound-damping screen |
| EP1021686A1 (en) * | 1997-09-11 | 2000-07-26 | HRL Technology Pty. Ltd. | An improved sound attenuating device |
| GB2621015A (en) * | 2023-06-06 | 2024-01-31 | Pineapple Contracts Unlimited | Wall panel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10122617C1 (en) * | 2001-05-10 | 2002-06-20 | Lta Lufttechnische Komponenten | Sound-damping panel for ventilation plant has stabilized metal foil or plate spaced out on gas side of absorption material |
| DE102009034463A1 (en) | 2009-07-22 | 2011-02-03 | Filtro Klimatechnik Gmbh | Airborne sound absorbing device, particularly for use in air conditioning units, comprises sound absorbing bodies arranged in air flow channel or housing, where cover is designed at end of front side of sound absorbing body |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU407054A (en) * | 1954-10-22 | 1955-12-01 | Thorp Clive Cowdrey | Improved means for securing surfacing or roofing materials orthe like to building structures |
| FR2420080A1 (en) * | 1978-03-14 | 1979-10-12 | Ciat Sa | Fibrous sound absorbent screen for ventilation duct - is impregnated with binder to prevent fibrous contamination of air flow |
| CH640074A5 (en) * | 1978-11-09 | 1983-12-15 | Keller Alfred | Sound-absorbing body and method for the manufacture thereof |
| DE3417874A1 (en) * | 1983-05-19 | 1984-11-22 | United McGill Corp., Groveport, Ohio | SOUND SWALLOW PLATE AND SOUND SWALLOWING PROCESS |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2630056A1 (en) * | 1975-07-30 | 1977-02-17 | Industrial Acoustics Co | SILENCER |
| DE8303575U1 (en) * | 1983-02-09 | 1983-06-09 | Gerb-Akustik Consult GmbH, 4300 Essen | DEVICE FOR DAMPING NOISE IN COOLING DOORS AND LARGE BLOWED. |
-
1986
- 1986-02-21 DE DE3605684A patent/DE3605684C2/en not_active Expired - Fee Related
-
1987
- 1987-02-19 EP EP87102341A patent/EP0236810B1/en not_active Expired - Lifetime
- 1987-02-19 AT AT87102341T patent/ATE95935T1/en not_active IP Right Cessation
- 1987-02-19 DE DE87102341T patent/DE3787742D1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU407054A (en) * | 1954-10-22 | 1955-12-01 | Thorp Clive Cowdrey | Improved means for securing surfacing or roofing materials orthe like to building structures |
| FR2420080A1 (en) * | 1978-03-14 | 1979-10-12 | Ciat Sa | Fibrous sound absorbent screen for ventilation duct - is impregnated with binder to prevent fibrous contamination of air flow |
| CH640074A5 (en) * | 1978-11-09 | 1983-12-15 | Keller Alfred | Sound-absorbing body and method for the manufacture thereof |
| DE3417874A1 (en) * | 1983-05-19 | 1984-11-22 | United McGill Corp., Groveport, Ohio | SOUND SWALLOW PLATE AND SOUND SWALLOWING PROCESS |
Non-Patent Citations (2)
| Title |
|---|
| Merkblatt "Relaxationsschalldämpfer-Elemente Typ F" vom 05.04.1980, Firma G+H Montage, D-6700 Ludwigshafen * |
| Merkblatt "Relaxationsschalldämpfer-Elemente Typ R" vom 06.11.1980, Firma G+H Montage, D-6700 Ludwigshafen * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0531698A2 (en) * | 1991-09-12 | 1993-03-17 | Luwa Aktiengesellschaft | Sound-damping screen and cassette for sound-damping screen |
| EP0531698A3 (en) * | 1991-09-12 | 1993-06-16 | Luwa Aktiengesellschaft | Sound-damping screen and cassette for sound-damping screen |
| EP1021686A1 (en) * | 1997-09-11 | 2000-07-26 | HRL Technology Pty. Ltd. | An improved sound attenuating device |
| EP1021686A4 (en) * | 1997-09-11 | 2001-08-08 | Hrl Technology Pty Ltd | An improved sound attenuating device |
| GB2621015A (en) * | 2023-06-06 | 2024-01-31 | Pineapple Contracts Unlimited | Wall panel |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3605684A1 (en) | 1987-08-27 |
| DE3787742D1 (en) | 1993-11-18 |
| EP0236810B1 (en) | 1993-10-13 |
| ATE95935T1 (en) | 1993-10-15 |
| DE3605684C2 (en) | 1996-11-21 |
| EP0236810A3 (en) | 1988-01-27 |
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