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Noise protection - multifunctional and aesthetical
Date:1/14/2013

s, to allow the molecules to continue oscillating once they have passed through, as otherwise the sound would simply be reflected. Depending on the material, the holes are drilled, punched or pricked. "Above all, it's a question of cost efficiency," explains Prof. Leistner. "When it comes to ensuring the manufacturing process is cost-effective, it's important to realize that not all methods are equally well suited for every material." For it goes without saying that despite all the advantages they offer, sound absorbers must also remain affordable. Stuttgart staff and their industrial partners have already worked together to develop a whole generation of market-ready microperforated acoustic construction components. The technology means that, for the first time, it is possible to make sound absorbers that are both transparent and translucent. When mounted onto building faades or as noise barriers at the roadside, these materials have the desired effect without detracting from the landscape, and they can also be superbly integrated into the interior architecture of buildings.

Elastic surfaces for hygiene-sensitive areas

New additions to the sound absorber family are expected thanks to the latest developments at the IBP. Scientists there are working on elastic surfaces that are made of tubes arranged side by side, with microscopically small spaces in between. "It's a bit like having a brush with bristles that are enhanced by little extra attachments at the ends only much denser," explains Prof. Leistner. Such a pliable surface means even micro-holes can be cleaned easily, making it a material that is particularly suitable for use in hygiene-sensitive areas. Extrusion technology has proved especially cost-effective for large-scale applications. This method produces a two-dimensional surface profile with micro-slits, air chambers and base plate by pressing materials such as plastic or aluminum through a shaped nozzle. In the same way as with window
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Contact: Philip Leistner
philip.leistner@ibp.fraunhofer.de
49-711-970-3346
Fraunhofer-Gesellschaft
Source:Eurekalert  

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