SOUND INSULATION COMPONENT FOR A RIGID STRUCTURAL MEMBER OF AN AUTOMOBILE
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United States of America Patent
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Issued Date -
Jan 14, 2010
app pub date -
Sep 28, 2007
filing date -
Sep 29, 2006
priority date (Note) -
Abandoned
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Abstract
A sound-insulation component for a rigid structural member, of the type including a mass-spring system (12) includes at least one layer of a heavy mass (16) and one layer defining a spring (14), and a sound absorption system (18) with two layers having different air-flow resistances. The structural member is a metal sheet, the mass-spring system (12) is provided on one side of the rigid structural member (10), and the sound absorption system (18) is provided on the other side of the rigid structural member (10). The first layer (22) among the two layers of the sound absorption system (18) consists of a non-woven fabric having an adjustable air-flow resistance. Application in the sound insulation of automobiles.
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