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Entwicklung von nicht-porösen Absorbern für den technischen Schallschutz

: Ackermann, U.; Frommhold, W.; Fuchs, H.V.

Bauphysik (1989), No.11, pp.28-36
ISSN: 0171-5445
ISSN: 1437-0980 (Online)
Fraunhofer-Institut für Bauphysik (Tagung) <1989, Stuttgart>
Conference Paper
Fraunhofer IBP ()
Brandschutz; fire protection; hygiene; Kohlegrube; medium and low frequencies; Membran-Absorber; mittlere und tiefere Frequenz; Rauchgas-Reinigungsanlage; Resonanzabsorber; Strömungsverlust

The development of a novel resonance absorber is described. The vibrating elements of the "membrane absorber" are the perforation membrane, the air plug in the hole, the impermeable covering membrane with the air cushion enclosed in the chamber behind functioning as a spring. This complex resonator does not require any additional absorbing material to achieve a broad-band effect in the range of medium and low frequencies. Since the membrane absorber is hermetically sealed all around against its environment and has completely smooth outer surfaces, it is especially suitable for application in fields where high demands on hygiene conditions and fire protection, low frictional losses and small volume and weight are important. Silencer splitters completely made of stainless steel are described as an example for the application of the membrane absorber under harsh conditions in coal mines and air cleaning devices for industrial plants.