Acoustical material

Details Acoustical material Acoustical material

E - Fixed Constructions

04

B

181/16, 96/256

E04B 1/74 (2006.01) E04B 1/86 (2006.01) E04B 9/04 (2006.01) H02K 5/24 (2006.01) E04B 1/84 (2006.01)

Patent

CA 1227757

ACOUSTICAL MATERIAL Abstract of the Disclosure The disclosure is directed broadly to a thin metal sheet containing a multitude of small openings therethrough. Typically, the sheet will contain at least 400 openings per square inch with the openings having an average cross-sectional area of from about 0.0005 to about 0.005 square inch. The sheets are used to overlay a series of perpendicularly aligned walls which define air chamber(s) behind the sheet. Sound waves pass through the porous sheet and are absorbed in the air chamber(s).

460147

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