Sound insulation part for surfaces

Details Sound insulation part for surfaces Sound insulation part for surfaces

1986-09-08

1987-11-10

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Sound absorbing panels

181286, 181288, 181294, E04B 182

Patent

active

047051396

ABSTRACT:
A sound insulation part for surfaces with known source-sink distribution, in particular in passenger spaces of motor vehicles, is provided, which is designed as a mass-spring system with discontinuities incorporated therein for the purpose of converting sources into sinks. In order to achieve a particularly effective sound insulation with low mass or light weight, the sound insulation part contains, over limited parts of its surface, closed cells (1) embedded in the spring (foam 3) and encased in coils (2). These cells (1) can be directed towards the heavy layer (4) or the panel (8) which the part adjoins, or can be wholly or partly in the intermediate region. The cells (1) can be gas- or air-filled. The foils (2) advantageously have masses of about 25 to 150 g/m.sup.2 of surface.

REFERENCES:
patent: 1801786 (1931-04-01), Woodall et al.
patent: 2116771 (1938-05-01), Seaman
patent: 2768091 (1956-10-01), Cubberley
patent: 4167598 (1979-09-01), Logan et al.
patent: 4479992 (1984-10-01), Haeseker et al.
Page 73 of the book "Technische Larmabuehr" (Technical Noise Abatement), Warner Zeller (1950).
EPB-Mitteilung, 39,7 of the Fraunhofer-Institute Fur Bauphysik (1979).
"Intensitatsmessung im Kraftfahrzeuginnenraum mit einem kleinem Analogmessgerat" (Intensity Measurement in Motor Vehicle Interiors with a Small Analogue Measuring Instrument) VD1 Report, 526, pp. 137-151.
"Prufstandsuntersuchungen an Fahrzeugrorbauten als Basis fur Schallisolierungen" (Test Stand Tests on Vehicle Fore-Parts as a Basis for Sound Insulation) PAGA 1984.

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