Sound-absorbing panels
Thermal treatment of polystyrene foam boards creates structured surfaces with deep channels to enhance sound absorption, addressing the lack of effective sound insulation on building facades and improving urban acoustic environments.
Patent Information
- Application Number
- DE102024001200
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-10-16
AI Technical Summary
Existing polystyrene foam panels lack effective sound absorption capabilities on building facades and surfaces, particularly in urban environments, and there is a need for improved sound insulation to mitigate disruptive noise.
Polystyrene foam boards are treated with thermal heat radiation to create a structured surface with deep channels and distortions, enhancing sound absorption by controlling sound direction and alignment, which can be applied in situ or pre-manufactured with acoustic measurement technology.
The treated panels provide enhanced sound absorption, reducing disruptive noise in urban areas and improving acoustic insulation on building facades and surfaces.
Smart Images
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Abstract
Description
[0001] Sound-absorbing panels with a body made of polystyrene foam have been around for many years. Holes and recesses are arranged in the surface, which is mounted as an open surface facing the room, so that incoming sound waves are directed into the holes and recesses, thus creating a sound-absorbing effect. These polystyrene sound-absorbing panels are available on the market as prefabricated panels in various dimensions, sizes, and thicknesses.
[0002] In the context of the increasingly important thermal insulation and heat insulation of the facades of buildings by means of polystyrene foam panels themselves, the task arises to propose sound-absorbing panels not only for use in interior spaces such as for ceiling and wall surfaces, but also sound-absorbing surfaces on the building facades and / or surfaces in front of them at a distance, also in the context of the increasingly important environmental protection goals against unwanted, harmful, stressful and disturbing sound transmission through the facade surfaces.
[0003] According to the invention it is proposed to use polystyrene foam boards which change their surface in a predetermined manner under the application of thermal heat radiation such as hot air radiation from the well-known hot air guns which radiate heat up to 650 degrees C, so that previously smooth surfaces which had almost no sound absorption effect ( Fig. 1) then provide a completely changed surface and an encrusted, fissured, highly structured with deep channels and faults of the surface ( Fig. 2) and thus provide a perfect sound-absorbing surface. The structure of the surface is achieved by changing temperatures, distances and the duration of the heat exposure. In addition to providing the product as a finished product in the form of a sound-absorbing panel, the invention proposes that the surface be changed to create a sound-absorbing surface only on the panel that has already been mounted on the object of final assembly, and that the desired alignment of the sound-absorbing effect be achieved in the process.
[0004] With the help of acoustic measuring devices, the surfaces are shaped in such a way that sound arriving from certain directions is reduced by specifically aligning larger surfaces against this direction.
[0005] The larger surface area is achieved by applying increased heat to these areas. These jagged surfaces are created, variable, up to a depth of 2 centimeters or only in the immediate upper surface structure.
[0006] By using vertical, horizontal or diagonal grooves, structures and depressions, a desired sound absorption strength, sound absorption effect and orientation can be achieved and controlled.
[0007] Using sound measurement technology, the deformation of the surfaces is created on-site, either as part of a targeted alignment or for a desired general local sound insulation. Concave or convex surfaces are part of the possible, optimal alignment.
[0008] In another application, a plate-shaped, factory-adjusted sound absorption effect and sound absorption orientation are also available. The identification of the sound absorption effects and orientation is marked directly on the body of the sound absorption plate. By partially closing the previously formed openings, even after During installation, a change in the sound absorption effect can be carried out and also verified.
[0009] Paint and other thin-layer coatings, such as spray coatings, do not significantly alter the sound absorption effect. It is also suggested that coatings to modify flammability be applied using a simple spray process, such as cement-based liquids.
[0010] As part of the desired reduction in noise emissions, an easily achievable sound absorption effect is achieved for entire inner cities, neighborhoods and residential areas, which significantly improves the quality of life there.
[0011] According to the invention, the proposed sound-absorbing technology is also used in conjunction with thermal insulation composite systems and facade thermal insulation. This also applies to mineral fiber insulation board systems and ventilated facade cladding.
[0012] Overall, a sound-absorbing technology is proposed that reduces disturbing and often harmful noise, especially in confined urban spaces and neighborhoods. This also applies to small areas, such as the ceilings above balconies and their side walls, where disturbing traffic noise is reflected directly onto the balconies' usable surfaces.
Claims
[1] Sound-absorbing panels with a body made of polystyrene foam characterized by that their surface is your previously smooth surface ( Fig. 1) by exposure to a hot air jet lasting only a few seconds, with a temperature between 150°C and 650°C, at varying distances between 5cm and 50cm, in still ambient air at 18°C, and thereby generating varying temperatures on the surface of the polystyrene foam body, into a three-dimensional, highly structured surface with depressions, encrustations, worm-like faults and channels extending into the depths ( Fig. 2) transformed with a high sound absorption effect. [2] Sound-absorbing panels according to claim 1 characterized by that the final surface is covered with a film of cement / plaster and / or sprayed with paint. [3] Sound-absorbing panels according to claims 1 and 2, characterized bythat the sound-absorbing panel is fixed to non-combustible panels such as cement fiber panels and that this panel itself is fixed above a ventilated thermal insulation on facades, and can also be unscrewed. [4] Sound-absorbing panels according to claim 1, 2, 3 characterized by that these are integrated in parts of the surface into a thermal insulation composite system made of mineral fiber and / or synthetic foams. [5] Sound-absorbing panels according to claims 1, 2, 3, 4 characterized by , that the three-dimensional thermal deformation is only carried out on site after assembly on a facade surface. [6] Sound-absorbing panels according to claim 1, 2, 3, 4, 5 characterized byThe mounting of the sound-absorbing panel elements takes place on mechanically adjustable frames, which, depending on accessibility from the floor, can also be electrically adjustable with a remote control, in order to adjust the locally desired sound absorption effect where sound reduction is desired. [7] Sound-absorbing panels according to claim 1, 2, 3, 5, 6, characterized by , that sound-absorbing elements fixed to frames have a thinly peeled surface, yet exhibiting the sound-absorbing effect, on convex or concave shaped frame basic forms.