Acoustical material for use in association with noise generating

Details Acoustical material for use in association with noise generating Acoustical material for use in association with noise generating

1975-01-09

1976-08-31

Gonzales, John

Acoustics

Auditorium

E04B 199, G10K 1104

Patent

active

039774929

ABSTRACT:
An improved acoustical material, which is simple in construction and uses conventional, inexpensive materials, for use as a lining material in association with noise generating machinery, comprising, in combination, a composite layer of plural layers of porous material which will not deteriorate, swell or retain oil, solvents, or water such as are found in machinery, and which has acoustical flow resistance of between 20 rayls and 80 rayls, and a highly porous layer which is or acts as a dead air space relative to the composite.

REFERENCES:
patent: 3103987 (1963-09-01), Gildard et al.
patent: 3166149 (1965-01-01), Hulse et al.
patent: 3255843 (1966-06-01), MacDonald
patent: 3502171 (1970-03-01), Cowan
patent: 3630312 (1971-12-01), Woodward et al.
patent: 3700067 (1972-10-01), Dobbs et al.
patent: 3734234 (1973-05-01), Wirt
patent: 3770560 (1973-11-01), Elder et al.

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