COMPOSITE MATERIAL MULTILAYERED MEMBRANE WITH SOUND INSULATING AND SOUND ABSORBING TO MITIGATE IMPACT NOISE
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United States of America Patent
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Issued Date -
Nov 11, 2010
app pub date -
May 11, 2009
filing date -
May 11, 2009
priority date (Note) -
Abandoned
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Abstract
The composite material multilayered membrane of the present invention is sound insulating and sound-absorbent, acting as sound deadening insulation for noise impacts, mainly but not exclusively to be used in flooring, and in particular under the slab in floating floors, with the aim of reducing the transmission of noise into the below room. This membrane includes several layers, which include at least one polymeric monofilament three dimensional mat, at least one resilient mat, and at least one topping layer of waterproofing, breathable or not, tissue. This multilayered membrane with a thickness under a weight of 2 kPa of at least 8 and maximum 15 mm, preferably 10-12 mm, so as to achieve a normalized noise level in the disturbed room Lnw below 50 dB, or an impact insulation class of at least 60 points.
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