EP0504629B1 - Panel-like sound absorbing element, and sound absorbing arrangement - Google Patents

Panel-like sound absorbing element, and sound absorbing arrangement Download PDF

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Publication number
EP0504629B1
EP0504629B1 EP92103210A EP92103210A EP0504629B1 EP 0504629 B1 EP0504629 B1 EP 0504629B1 EP 92103210 A EP92103210 A EP 92103210A EP 92103210 A EP92103210 A EP 92103210A EP 0504629 B1 EP0504629 B1 EP 0504629B1
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Prior art keywords
grooves
bores
element according
rows
sound absorbing
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German (de)
French (fr)
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EP0504629A2 (en
EP0504629A3 (en
EP0504629B2 (en
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Arthur Fries
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    • 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

Definitions

  • the present invention relates to a plate-shaped sound absorber system element and a sound absorber system.
  • Such plate-shaped sound absorber elements are known, which are perforated throughout.
  • the prior art also includes chipboard with grooves from the visible side or with offset, continuous slots.
  • Longitudinally and transversely grooved panels are also known, the front being longitudinally grooved and the rear of the panel being cross-grooved.
  • There are also plates with a porous material structure. All of these known plate-shaped elements can only be changed within relatively narrow limits in such a way that they are suitable for a broad spectrum of acoustic problems, in particular for sound insulation.
  • the present invention aims to provide a plate-shaped sound absorber system element, in which systems the respective execution of the elements can be selected depending on the task and the circumstances by changing the decisive parameters.
  • Such a plate-shaped sound absorber element is characterized by one of the claims.
  • the acoustic element 1 shown in FIGS. 1 to 3 points with its visible side into the room in which the sound source is located.
  • grooves 4 are introduced in the longitudinal direction, which, as shown in FIG. 2, have a rectangular or square cross section with a groove base 5.
  • the back of the plate-shaped acoustic element 1, the so-called absorber side 7, is provided with bores 8, the axes of which in the present case lie in the central planes of the grooves 4 and are perpendicular to the longitudinal axes of the grooves 4.
  • the depth of the grooves 4 is approximately 1/3, as can be seen from FIG. 2 and is indicated there.
  • leading passages 9 are formed, through which the energy to be damped passes from one side of the plate to the other.
  • the absorber side 7 is covered with a stone or glass wool mattress 11, which serves as a destroyer for the energy, in the present case in particular sound energy.
  • FIGS. 4 and 5 Another pattern of the procurement of the passages from the visible side of such an acoustic element, seen from the visible side, is shown in FIGS. 4 and 5 with a differently designed grid of the bores on the absorber side and different distances of the grooves on the visible side. Furthermore, the side areas to the groove bases 5 are connected to one another by rounded end faces 16, which in turn has a specific effect with regard to energy dissipation.
  • the longitudinal grooves on the visible side 2 of the acoustic element have conical groove cross sections 18, while the bores 8 overlap in groups such that the passages 9 have corresponding longitudinal dimensions, a further possibility to deal with this Adapt the problem to be solved by changing the shape and location of the passageways.
  • a side comb 12 on the one long side and a corresponding groove 13 on the other long side are additionally indicated, which allows these elements to be assembled into a more or less large area.
  • Fig. 10 shows the front surface of an element. This is very pleasing in that the recessed transverse and longitudinal grooves form 20 and 21 squares. The bottom of the groove can be colored if necessary. Of course, it is also possible to provide the grooves so that standing or lying rectangles are created. this will depend on the spatial conditions.
  • the absorber percentage can be changed from 0 to 25% of the area percentage.
  • Sound-absorbing elements are installed sandwich-like, with an additional sound-absorbing plate, for example in the form of a chipboard or plasterboard, on the back of the element, i.e. is applied over the absorber mat (stone or glass wool mattress).
  • an additional sound-absorbing plate for example in the form of a chipboard or plasterboard, on the back of the element, i.e. is applied over the absorber mat (stone or glass wool mattress).
  • Such elements can also be used to control the sound energy, i.e. find use as so-called sound diffusers.
  • such acoustic elements are preferably made from natural wood.
  • the desired sound effect can be optimized accordingly by an optimal choice of solid wood.
  • boards such as plywood, chipboard, MDF and.
  • appropriate carrier plates with cement components for example "Duripanel”, can be used. Sound engineering solutions based on biological principles can also be realized by appropriate choice of materials.
  • Such acoustic elements can be of large format, for example with lengths of up to 5 m and widths of 100 to 200 mm and thicknesses of 12 to 20 mm. This information is only for example.
  • the visible side of the elements can with respect to groove depth, groove width, groove spacing, groove inclination and cross-section, u.
  • the like variably designed and the surface profiling, e.g. smooth, rounded, concave, convex, etc. and adapted to the requirements at hand.
  • the absorber side or back of the elements can be in terms of hole position, hole depth, e.g. conical holes, hole diameter and hole arrangement as well as hole shape, also meet these requirements.
  • the combination of creasing or profiling on the visible side and perforations in the manner discussed on the back results in an optimal characteristic for solving the problem that arises.
  • the surfaces of such elements can be varied as desired, i.e. with natural surfaces, lacquered, stained, glazed, opaque lacquered, painted etc.

Abstract

The panel-like element is used in particular for sound-absorbing arrangements. It has, starting from both the main surfaces (2, 7), cutouts (4, 8) which meet in the interior of the element (1) and partially overlap one another. At the same time, the cutouts (4) of one element side and those (8) of the other element side (7) have different shapes in such a manner that the cutouts (4, 8) establish passages (9) through the element (1). The cutouts (8) of the absorber side (7) are arranged in rows and the rows in a grid shape. One element side (7) is provided with bores (8) and the other (2) with grooves (4). At the same time, the bores (8) are arranged in rows which are parallel to and open into the grooves (4). This panel-like element can thus very easily be alternatively designed according to the specific function or circumstances by changing the ruling parameters. <IMAGE>

Description

Die vorliegende Erfindung betrifft ein plattenförmiges Schallabsorberanlagen-element sowie eine Schallabsorberanlage.The present invention relates to a plate-shaped sound absorber system element and a sound absorber system.

Es sind derartige plattenförmige Schallabsorberanlagen-elemente bekannt, welche durchgehend gelocht sind. Zum Stande der Technik gehören ferner Röhrenspanplatten mit Rillen von der Sichtseite her bzw. mit abgesetzten, durchgehenden Schlitzen. Auch sind längs- und quergerillte Platten bekannt, wobei die Frontseite längsgerillt, die Rückseite der Platte quergerillt ist. Es gibt ferner Platten mit porösen Materialaufbau. Alle diese bekannten plattenförmigen Elemente lassen sich nur in relativ engen Grenzen derart verändern, dass sie für ein breites Spektrum akustischer Probleme, insbesondere für den Schallschutz, geeignet sind.Such plate-shaped sound absorber elements are known, which are perforated throughout. The prior art also includes chipboard with grooves from the visible side or with offset, continuous slots. Longitudinally and transversely grooved panels are also known, the front being longitudinally grooved and the rear of the panel being cross-grooved. There are also plates with a porous material structure. All of these known plate-shaped elements can only be changed within relatively narrow limits in such a way that they are suitable for a broad spectrum of acoustic problems, in particular for sound insulation.

Die vorliegende Erfindung bezweckt die Schaffung eines plattenförmigen Schallabsorberanlagen-elementes, bei welchen anlagen durch Verändern der massgebendenParameterdie jeweilige Ausführung der Elemente aufgaben- und umständespezifisch wählbar ist.The present invention aims to provide a plate-shaped sound absorber system element, in which systems the respective execution of the elements can be selected depending on the task and the circumstances by changing the decisive parameters.

Ein derartiges plattenförmiges Schallabsorberanlagen-element zeichnet sich durch einen der Ansprüche aus.Such a plate-shaped sound absorber element is characterized by one of the claims.

Die Erfindung wird anschliessend beispielsweise anhand einer Zeichnung erläutert.The invention is subsequently explained, for example, using a drawing.

Es zeigen:

  • Fig. 1 eine Aufsicht auf ein Akustikelement,
  • Fig. 2 eine Vorderansicht des Akustikelementes gemäss Fig. 1 mit schallschluckender Stein- oder Glaswollmatratze,
  • Fig. 3 eine Seitenansicht des Elementes nach den Fig. 1 und 2,
  • Fig. 4 eine weitere Ausführung eines Akustikelementes analog Fig. 1,
  • Fig. 5 eine Vorderansicht des Elementes nach Fig. 4 analog Fig. 2,
  • Fig. 6 eine Variante eines Akustikelementes analog den Fig. 1 und 4,
  • Fig. 7 eine Vorderansicht des Elementes gemäss Fig. 6,
  • Fig. 8 eine Variante eines Akustikelelmentes analog den Fig. 1 und 4,
  • Fig. 9 eine Vorderansicht des Elementes gemäss Fig. 6,
  • Fig. 10 eine Vorderansicht eines Elementes analog Fig. 1 mit speziell ansprechenden Muster der Ausnehmungen auf der Sichtfläche.
Show it:
  • 1 is a plan view of an acoustic element,
  • 2 shows a front view of the acoustic element according to FIG. 1 with sound-absorbing stone or glass wool mattress,
  • 3 is a side view of the element of FIGS. 1 and 2,
  • 4 shows a further embodiment of an acoustic element analogous to FIG. 1,
  • 5 is a front view of the element of FIG. 4 analogous to FIG. 2,
  • 6 shows a variant of an acoustic element analogous to FIGS. 1 and 4,
  • 7 is a front view of the element of FIG. 6,
  • 8 shows a variant of an acoustic element analogous to FIGS. 1 and 4,
  • 9 is a front view of the element of FIG. 6,
  • Fig. 10 is a front view of an element analogous to Fig. 1 with a particularly appealing pattern of the recesses on the visible surface.

Das in den Fig. 1 bis 3 dargestellte Akustikelement 1 weist mit seiner Sichtseite in den Raum, in welchem sich die Schallquelle befindet. Auf dieser Sichtseite 2 sind in Längsrichtung Nuten 4 eingebracht, welche, wie Fig. 2 zeigt, rechteckigen oder quadratischen Querschnitt mit einem Nutengrund 5 haben.The acoustic element 1 shown in FIGS. 1 to 3 points with its visible side into the room in which the sound source is located. On this visible side 2 grooves 4 are introduced in the longitudinal direction, which, as shown in FIG. 2, have a rectangular or square cross section with a groove base 5.

Die Rückseite des plattenförmigen Akustikelementes 1, die sog. Absorberseite 7, ist mit Bohrungen 8 versehen, deren Achsen im vorliegenden Falle in den Mittelebenen der Nuten 4 liegen und senkrecht auf den Längsachsen der Nuten 4 stehen. Es ist indessen auch möglich, die Achsen der Bohrungen 8 seitlich zu versetzen und/oder sie nicht senkrecht, sondern geneigt zur Längsachse der Nuten 4 zu bohren.The back of the plate-shaped acoustic element 1, the so-called absorber side 7, is provided with bores 8, the axes of which in the present case lie in the central planes of the grooves 4 and are perpendicular to the longitudinal axes of the grooves 4. However, it is also possible to laterally offset the axes of the bores 8 and / or to drill them not vertically but at an angle to the longitudinal axis of the grooves 4.

Während die Bohrungen 8 eine Tiefe von ungefähr 2/3 der Plattendicke aufweisen, ist die Tiefe der Nuten 4 ungefähr 1/3, wie dies aus Fig. 2 ersichtlich und dort angedeutet ist. Im Bereich der Ueberdeckung der Nuten 4 und der Bohrungen 8 entstehen durch das Akustikelement 1 führende Durchgänge 9, durch welche die zu dämpfende Energie von der einen Plattenseite zur anderen gelangt.While the bores 8 have a depth of approximately 2/3 of the plate thickness, the depth of the grooves 4 is approximately 1/3, as can be seen from FIG. 2 and is indicated there. In the area of the overlap of the grooves 4 and the bores 8, through the acoustic element 1 leading passages 9 are formed, through which the energy to be damped passes from one side of the plate to the other.

Die Absorberseite 7 ist, wie die Fig. 2 und 3 zeigen, mit einer Stein- oder Glaswollmatratze 11 bedeckt, welche als Vernichter für die Energie, im vorliegenden Fall insbesondere Schallenergie, dient.As shown in FIGS. 2 and 3, the absorber side 7 is covered with a stone or glass wool mattress 11, which serves as a destroyer for the energy, in the present case in particular sound energy.

Ein anderes Muster der Beschaffung der Durchgänge von der Sichtseite eines derartigen Akustikelementes, von der Sichtseite aus gesehen, zeigen die Fig. 4 und 5 mit anders ausgebildetem Raster der Bohrungen auf der Absorberseite und unterschiedlichen Abständen der Rillen auf der Sichtseite. Ferner sind die Seitenbereiche zu den Nutengründen 5 durch gerundete Abschlussflächen 16 miteinander verbunden, was wiederum eine spezifische Wirkung bezüglich Energievernichtung zur Folge hat.Another pattern of the procurement of the passages from the visible side of such an acoustic element, seen from the visible side, is shown in FIGS. 4 and 5 with a differently designed grid of the bores on the absorber side and different distances of the grooves on the visible side. Furthermore, the side areas to the groove bases 5 are connected to one another by rounded end faces 16, which in turn has a specific effect with regard to energy dissipation.

In der Ausführung einer weiteren Variante gemäss den Fig. 6 und 7 weisen die Längsnuten auf der Sichtseite 2 des Akustikelementes konische Nutenquerschnitte 18 auf, während die Bohrungen 8 gruppenweise derart einander überschneiden, dass die Durchgänge 9 entsprechende Längsdimensionen aufweisen, eine weitere Möglichkeit, sich dem zu lösenden Problem durch Form- und Ortsänderung der Durchgänge anzupassen.In the embodiment of a further variant according to FIGS. 6 and 7, the longitudinal grooves on the visible side 2 of the acoustic element have conical groove cross sections 18, while the bores 8 overlap in groups such that the passages 9 have corresponding longitudinal dimensions, a further possibility to deal with this Adapt the problem to be solved by changing the shape and location of the passageways.

In Fig. 7 sind zusätzlich ein seitlicher Kamm 12 auf der einen Längsseite und eine entsprechende Nut 13 auf der anderen Längsseite angedeutet, was erlaubt, diese Elemente zu einer mehr oder weniger grossen Fläche zusammenzubauen.In Fig. 7, a side comb 12 on the one long side and a corresponding groove 13 on the other long side are additionally indicated, which allows these elements to be assembled into a more or less large area.

Fig. 10 zeigt die Vorderfläche eines Elementes. Diese ist sehr gefällig, indem die ausgenommenen Quer-und Längsrillen 20 und 21 Quadrate bilden. Der Rillengrund kann gegebenenfalls gefärbt werden. Es ist natürlich auch möglich, die Rillen so vorzusehen, dass stehende oder liegende Rechtecke entstehen. Dies wird sich nach den Raumverhältnissen richten.Fig. 10 shows the front surface of an element. This is very pleasing in that the recessed transverse and longitudinal grooves form 20 and 21 squares. The bottom of the groove can be colored if necessary. Of course, it is also possible to provide the grooves so that standing or lying rectangles are created. this will depend on the spatial conditions.

Zusammenfassend ist folgendes festzuhalten:

  • Durch Anbringen verschiedener Ausnehmungen, einerseits auf der Sichtseite und anderseits auf der Absorberseite solcher Elemente, und durch deren Variierbarkeit in besprochenem Sinne ist es möglich, die Charakteristiken bezüglich Schallvernichtung leicht zu verändern und damit den örtlichen Gegebenheiten und der Schallquelle anzupassen.
In summary, the following should be noted:
  • By making different recesses, on the one hand on the visible side and on the other hand on the absorber side of such elements, and by their variability in the discussed sense, it is possible to change the characteristics with regard to sound destruction easily and thus adapt them to the local conditions and the sound source.

Der Absorberanteil kann je nach Ausführung der Elemente von 0 bis 25% des Flächenanteils verändert werden.Depending on the design of the elements, the absorber percentage can be changed from 0 to 25% of the area percentage.

Schalldämmende Elemente werden sandchwichartig montiert, wobei zusätzlich eine schalldämmende Platte, beispielsweise in Form einer Spanplatte oder Gipsplatte, auf die Rückseite des Elementes, d.h. über der Absorbermatte (Stein- oder Glaswollmatratze), aufgebracht wird.Sound-absorbing elements are installed sandwich-like, with an additional sound-absorbing plate, for example in the form of a chipboard or plasterboard, on the back of the element, i.e. is applied over the absorber mat (stone or glass wool mattress).

Derartige Elemente können durch entsprechende Materialwahl und Formgebung der Ausnehmung auch zur Lenkung der Schallenergie, d.h. als sog. Schalldiffusoren, Verwendung finden.Such elements can also be used to control the sound energy, i.e. find use as so-called sound diffusers.

Es hat sich gezeigt, dass solche Akustikelemente vorzugsweise aus Naturhölzern angefertigt werden. Durch eine optimale Massivholzauswahl kann der gewünschte schalltechnische Effekt entsprechend optimiert werden. Es ist aber auch möglich, kombinierte Platten, wie Sperrholzplatten, Spanplatten, MDF-Platten u. dgl. zu verwenden. Gegebenenfalls, insbesondere bei brandgefährdeten Objekten, können entsprechende Trägerplatten mit Zementkomponenten, beispielsweise "Duripanel", Verwendung finden. Auch können durch entsprechende Materialwahl schalltechnische Lösungen auf biologischen Grundlagen realisiert werden.It has been shown that such acoustic elements are preferably made from natural wood. The desired sound effect can be optimized accordingly by an optimal choice of solid wood. But it is also possible to combine boards such as plywood, chipboard, MDF and. Like. To use. If necessary, in particular in the case of objects at risk of fire, appropriate carrier plates with cement components, for example "Duripanel", can be used. Sound engineering solutions based on biological principles can also be realized by appropriate choice of materials.

Derartige Akustikelemente können grossformatig ausgebildet sein, beispielsweise mit Längen bis zu 5m und Breiten von 100 bis 200 mm sowie Dicken von 12 bis 20 mm. Diese Angaben sind nur beispielsweise.Such acoustic elements can be of large format, for example with lengths of up to 5 m and widths of 100 to 200 mm and thicknesses of 12 to 20 mm. This information is only for example.

Die Sichtseite der Elemente kann bezüglich Rillentiefe, Rillenbreite, Rillenabstand, Rillenneigung und - Querschnitt, u. dgl. variabel gestaltet sowie die Oberflächenprofilierung, z.B. glatt, gerundet, konkav, konvex, etc. sein und den vorliegenden Anforderungen angepasst werden. Die Absorberseite oder Rückseite der Elemente kann bezüglich Lochlage, Lochtiefe, z.B. konische Löcher, Lochdurchmesser und Lochanordnung sowie Lochform, ebenfalls diesen Anforderungen gerecht werden. Durch die Kombination von Rillung bzw. Profilierung auf der Sichtseite und Perforationen in der besprochenen Art auf der Rückseite ergibt sich jeweils eine optimale Charakteristik zur Lösung des auftretenden Problems.The visible side of the elements can with respect to groove depth, groove width, groove spacing, groove inclination and cross-section, u. The like variably designed and the surface profiling, e.g. smooth, rounded, concave, convex, etc. and adapted to the requirements at hand. The absorber side or back of the elements can be in terms of hole position, hole depth, e.g. conical holes, hole diameter and hole arrangement as well as hole shape, also meet these requirements. The combination of creasing or profiling on the visible side and perforations in the manner discussed on the back results in an optimal characteristic for solving the problem that arises.

Die Oberflächen derartiger Elemente können je nach Wunsch variierbar sein, d.h. mit Naturoberflächen, lackiert, gebeizt, glasiert, deckend lackiert, gestrichen usw.The surfaces of such elements can be varied as desired, i.e. with natural surfaces, lacquered, stained, glazed, opaque lacquered, painted etc.

Claims (12)

1. A panel-like sound absorbing element, characterized in that it comprises recesses (4, 8) starting from the two main surfaces (2, 7), joining together inside the element (1) and overlapping partially each other, so as to define passages (9) through the element (1), with the recesses (4) on one side (2) of the element and the recesses (8) on the other side (7) thereof exhibiting different shapes.
2. The element according to claim 1, characterized in that the recesses (8) on the absorbing side (7) are disposed in rows, with said rows being disposed in a grid-like configuration.
3. The element according to claim 1 or 2, characterized in that one side (7) of the element is provided with bores (8) and the other side (2) is provided with grooves (4), the bores (8) being preferably disposed in rows parallel to the grooves (4) and opening into said grooves.
4. The element according to claim 3, characterized in that the bores (8) of successive rows are offset in the direction of the grooves.
5. The element according to claim 3, characterized in that the bores (8) are provided in the form of truncated cones or pyramids converging towards the interior of the element.
6. The element according to claim 3, characterized in that the grooves (4) exhibit a dovetail-shaped cross-section.
7. The element according to claim 3, characterized in that the bores (8) are approximately twice as deep as the grooves (4).
8. The element according to any of claims 3 to 8, characterized in that the side surfaces of the grooves are interconnected through surfaces (16) with a rounded cross-section (figure 5).
9. The element according to claim 3, characterized in that the bores (8) positioned in line with the grooves are arranged in groups (figure 6).
10. The element according to claim 1 or 2, characterized in that the front face of the element comprises recesses (20, 21) forming rectangles or squares.
11. The element according to any of claims 1 to 10, characterized in that at least two sides of the element (1) are provided with a tongue (12) and a groove (13) for assembly (figure 7).
12. A sound absorbing arrangement, characterized in that it comprises a plurality of panel-like elements according to any of claims 1 to 11.
EP92103210A 1991-03-20 1992-02-26 Panel-like sound absorbing element, and sound absorbing arrangement Expired - Lifetime EP0504629B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH854/91 1991-03-20
CH854/91A CH683112A5 (en) 1991-03-20 1991-03-20 A disc-shaped element, in particular for sound absorption systems, and sound absorber system.

Publications (4)

Publication Number Publication Date
EP0504629A2 EP0504629A2 (en) 1992-09-23
EP0504629A3 EP0504629A3 (en) 1993-06-16
EP0504629B1 true EP0504629B1 (en) 1995-02-01
EP0504629B2 EP0504629B2 (en) 1998-10-28

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EP92103210A Expired - Lifetime EP0504629B2 (en) 1991-03-20 1992-02-26 Panel-like sound absorbing element, and sound absorbing arrangement

Country Status (5)

Country Link
US (1) US5362931A (en)
EP (1) EP0504629B2 (en)
AT (1) ATE118111T1 (en)
CH (1) CH683112A5 (en)
DE (1) DE59201310D1 (en)

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US5422446A (en) * 1991-03-20 1995-06-06 Fries; Arthur Panel shaped element, specifically for sound absorbing structures and a sound absorbing installation
EP0657870A2 (en) * 1993-12-10 1995-06-14 Nitto Boseki Co., Ltd. Light transmissive sound absorbing member
AU738186B3 (en) * 2001-01-04 2001-09-13 Wang Chao Hsiang Sound absorbing panel
EP1138842A1 (en) 2000-03-27 2001-10-04 Mäger AG Innenausbau Method for producing a panel-like sound-absorbing element and apparatus for carrying out said method
EP1508651A2 (en) 2003-08-20 2005-02-23 Diaplan Liegenschaftsverwaltungs GmbH Acoustical panel with slotted structure
WO2006056351A1 (en) 2004-11-24 2006-06-01 Fritz Egger Gmbh & Co. Cover layer and panel with sound-absorption properties and method for producing said layer and panel

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AT406279B (en) * 1998-01-20 2000-03-27 Diaplan Liegenschaftsverwaltun ACOUSTIC PANEL ELEMENT
US20030006092A1 (en) * 2001-06-27 2003-01-09 Rpg Diffusor Systems, Inc. Sound diffuser with low frequency sound absorption
DE10248072B4 (en) * 2002-10-15 2006-08-24 Waldemar Staudigel Sound-absorbing panel
WO2005035906A1 (en) * 2003-09-18 2005-04-21 Peter Kellner Heatable floor element having a surface layer
AT413121B (en) * 2004-02-24 2005-11-15 Lenz Nenning Gmbh MUFFLING PANEL
US7178630B1 (en) * 2004-08-30 2007-02-20 Jay Perdue Acoustic device for wall mounting for diffusion and absorption of sound
US7497301B2 (en) * 2005-01-27 2009-03-03 Fleetguard, Inc. Tubular acoustic silencer
WO2006113399A2 (en) * 2005-04-14 2006-10-26 Magyari Douglas P Acoustic scatterer
KR100645824B1 (en) * 2005-06-14 2006-11-14 김영옥 The sound-absorbing panel
WO2007032623A1 (en) * 2005-09-15 2007-03-22 Lg Chem, Ltd. Heating floor system
KR101274509B1 (en) * 2006-04-27 2013-06-13 마사오 스즈키 Sound insulating device
US20080223653A1 (en) * 2007-03-16 2008-09-18 Seoul National University Industry Foundation Poroelastic acoustical foam having enhanced sound-absorbing performance
US7721847B2 (en) * 2007-03-27 2010-05-25 9 Wood, Inc. Acoustic panel
DE102007040034B4 (en) 2007-08-24 2010-02-11 Vogl, Erich R. Plasterboard perforated plate for sound absorption
IT1393908B1 (en) * 2009-05-13 2012-05-17 Holteg S R L SOUND-ABSORBING PANEL
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Also Published As

Publication number Publication date
ATE118111T1 (en) 1995-02-15
US5362931A (en) 1994-11-08
EP0504629A2 (en) 1992-09-23
DE59201310D1 (en) 1995-03-16
EP0504629A3 (en) 1993-06-16
EP0504629B2 (en) 1998-10-28
CH683112A5 (en) 1994-01-14

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