Broadband sound absorber
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United States of America Patent
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Feb 10, 2015
Grant Date -
Jun 20, 2013
app pub date -
Jan 28, 2011
filing date -
Aug 26, 2010
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Abstract
The invention relates to a broadband sound absorber (1) which comprises a sound-absorbing filler material between two microperforated film webs (2) which are contiguous on their edges, said filler material optionally containing heavy fillers. The broadband sound absorber (1) achieves excellent acoustic insulation and has microperforations (4) all over or only in sections, said filler material optionally containing heavy fillers (mass density) and one or both microperforated film webs (2) having the same thickness across their surface or thickened portions (3, 5) of the same or a different material in some sections.
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