Depending on the sound source and the application conditions, silencers and encapsulations have to be adjusted to always different, under circumstances even narrowband noise spectra, and often are exposed to extreme mechanical, chemical and thermal loads. Every new application presents a challenge and demands innovative solutions, be it to minimize pressure losses (in ventilation systems) or to prevent overheating (of engines). In some cases, the soiling problem alone still prevents implementing suited noise control measures in ducts and machines, whereas occasionally exaggerated measures are encountered under normal conditions, especially with regard to the high frequencies. Considering that especially abrasion and soiling of fibrous or porous damping materials create severe problems, alternative, fiberless absorber technology is urgently needed (Fuchs 2001, 2002).


Sound Source Insertion Loss Glass Foam Sound Absorber Helmholtz Resonator 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.BerlinGermany

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