Sandwich panel for sound absorption
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United States of America Patent
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N/A
Issued Date -
Jul 9, 2009
app pub date -
Dec 12, 2008
filing date -
Dec 17, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An aircraft cabin panel for sound absorption, with a core layer that comprises a plurality of cells that extend in an open manner across the thickness of the core layer and that are separated from each other by cell walls, and with a first cover layer that faces away from the sound field, as well as a second cover layer that faces towards the sound field and that comprises a plurality of perforation holes. The second cover layer is multi-layered and apart from a layer with the perforation also comprises a second layer that acts as a flow resistance device. The second layer is arranged on the outside, and visually closes off the perforation, and the outer layer comprises an air-permeable woven fabric.
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