Fluid-impervious acoustic suppression panel

Details Fluid-impervious acoustic suppression panel Fluid-impervious acoustic suppression panel

1977-03-21

1978-12-19

Godici, N. P.

Acoustics

Sound-modifying means

Sound absorbing panels

181291, G10K 1104

Patent

active

041301757

ABSTRACT:
An acoustic suppression panel is provided with a perforated plate covering a layer of a bulk absorber. A flexible, fluid-impervious membrane is placed between the plate and the bulk absorber, and supported in a manner so as to permit the membrane to become essentially acoustically transparent. An acoustically hard backing plate is disposed adjacent the bulk absorber, the backing plate being provided with perforations to allow pressure equalization for flight applications. A facing sheet of sintered metal covers the perforated plate to provide an aerodynamically continuous flow surface for the plate which is highly resistant to foreign object impact.

REFERENCES:
patent: 2271929 (1942-02-01), Venzie
patent: 2326763 (1943-08-01), Crandell
patent: 2826261 (1958-03-01), Eckel
patent: 3770560 (1973-11-01), Elder
patent: 3948347 (1976-04-01), Rutledge
"Study and Tests to Reduce Compressor Sounds of Jet Aircraft", Technical Report DS-68-7, pp. II-61, II-62, II-212.

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