Acoustic barrier
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United States of America Patent
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May 7, 2013
Grant Date -
Mar 21, 2013
app pub date -
Sep 21, 2011
filing date -
Sep 21, 2011
priority date (Note) -
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Abstract
An acoustic dampening panel comprising: (a) a first layer of expanded polypropylene; (b) a solid layer having a surface weight between 2.4 kilograms per meter squared and 25 kilograms per meter squared; and, (c) a second layer of expanded polypropylene, where the first and second layers of expanded polypropylene sandwich the solid layer therebetween. The acoustic dampening panel may further comprise a fourth layer comprising a metal skin, where the solid layer and the metal skin sandwich the second layer therebetween.
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