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AssigneeHP Pelzer Holding GmbH
InventorsMarco Schneider, Dirk Jaeger, Volker Kursch, Edmund Sumann, Norbert Nicolai, Volkmar Schulze
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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) achieving excellent acoustic insulation comprises a sound-absorbing filler material between two film webs (2) which are contiguous on their edges and have 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.
A broadband sound absorber (1) with a high acoustic insulation, comprising a sound-absorbing filler material, between two sheets (2) in complete circumferential contact having a complete or area-dependent microperforation (4), wherein one or both microperforated sheets (2) have the same thickness throughout their area or partial swellings (3, 5) consisting of a material which is the same as or different from that of the sheet (2);
Dependencies are inferred from the claim text.