Sound-insulating and sound-damping composite structure

Details Sound-insulating and sound-damping composite structure Sound-insulating and sound-damping composite structure

1991-08-30

1993-09-14

Gellner, Michael L.

Acoustics

Sound-modifying means

Sound absorbing panels

181290, E04B 182

Patent

active

052451410

ABSTRACT:
A composite structure with sound-insulating and sound-damping effects for use on the interior surfaces of motor vehicles, comprising at least two groups of coatings resting loosely on one another. In particular, the first group consists of a bottom part (2) free to vibrate and provided with coatings (6) or a finish like that used in modern motor vehicle construction. Preferably the applied second group of coatings consists of an insulating coating (8, 9). This insulating coating can be provided with an additional protective layer (7) and/or a textile or textile-like decorative layer (5). According to the invention, insulating coating (8, 9) exhibits anisotropic air flow resistance. This is achieved in simple fashion by a carrier layer (9) with a geometric structure and a plurality of support 15 elements (13). These support elements (13) are formed essentially of narrow ribs and are arranged to form a complex cavity labyrinth in conjunction with the first group of coatings and thus permit lateral air flow with low flow resistance.

REFERENCES:
patent: 4340129 (1982-07-01), Salyers
patent: 4867271 (1989-09-01), Tschuclin-Mahrer
patent: 5057176 (1991-10-01), Bainbridge
The Patent Office Japanese Government "Patent Abstracts of Japan," Mar. 31, 1987 and JP-A-61 249853 (Mazda Motors Corp.) (Nov. 7, 1986).

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