Dual layer acoustical ceiling tile having an improved sound absorption value
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United States of America Patent
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-
Sep 3, 2002
Grant Date -
Oct 3, 2002
app pub date -
Dec 27, 2000
filing date -
Dec 27, 2000
priority date (Note) -
Granted
status (Latency Note)
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Abstract
An acoustical ceiling tile having an improved sound absorption value and having a dual layer of acoustical materials. The base mat layer has either no mineral wool or a low mineral wool content. The surface layer has a high mineral wool content which provides improved sound absorption values with or without perforating or fissuring the tile. The dual layer acoustical ceiling tile has a noise reduction coefficient (NRC) value of at least about 0.50.
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Family
International Classification(s)
Cited Art Landscape
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