Sound insulation

Details Sound insulation Sound insulation

1987-05-01

1988-09-06

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

156 79, 428159, 428166, 428173, 4283099, B32B 326, B32B 330

Patent

active

047692715

ABSTRACT:
A sound insulation comprising an elastomeric foam body (3) made of rubber and having a multiplicity of surface recesses (2), small granular elements (6) filled into the recesses, and a sheet (4) covering openings of the recesses. The granular elements may be made of metal, non-metallic inorganic matter or synthetic resin. The size of the granular elements may be 0.1 to 3 mm in diameter.

REFERENCES:
patent: 4241806 (1980-12-01), Metzger

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