초록 ▼

A base structure of a fibrous material has on one face thereof a plurality of acoustical perforations. Positioned over this perforated face is a vinyl layer having a plurality of apertures therein, the apertures of the vinyl being in number much greater than the number of perforations in the base st

A base structure of a fibrous material has on one face thereof a plurality of acoustical perforations. Positioned over this perforated face is a vinyl layer having a plurality of apertures therein, the apertures of the vinyl being in number much greater than the number of perforations in the base structure. The apertures in the vinyl sheet not all being in alignment with the perforations of the base structure, but the perforations of the base structure having a substantial number thereof in alignment with the apertures in the vinyl structure whereby an acoustical sound absorbing structure is formed.

대표청구항 ▼

A sound absorbing structure comprising in combination: (a) a fiber composition rigid baseboard having a plurality of large perforations in one face thereof; (b) a layer of fabric having an irregular outer surface contour forming the structure facing, adhered to and covering the perforated face of sa

A sound absorbing structure comprising in combination: (a) a fiber composition rigid baseboard having a plurality of large perforations in one face thereof; (b) a layer of fabric having an irregular outer surface contour forming the structure facing, adhered to and covering the perforated face of said baseboard; and (c) a fused resinous film covering said outer fabric layer and said film having an irregular surface contour, said resinous film and said fabric layer having multiple small sound emitting aperture means extending therethrough on the facing of the structure, a substantial number of said small irregular pierced aperture means being located in vertical alignment with each of the perforations in the base board, the remainder of said small aperture means being in non-alignment with the perforations in the base board, said aperture means being of such small size and appearing as narrow line cracks or narrow slits so that, being located in the irregular contoured surface of the film and fabric layers, the aperture means are substantially invisible at normal viewing distances while still providing improved sound absorption capabilities.