Acoustical composite

Details Acoustical composite Acoustical composite

1976-08-27

1978-03-07

Hunt, Brooks H.

Acoustics

Sound-modifying means

Sound absorbing panels

E04B 199

Patent

active

040774910

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 is disclosed. It comprises two woven fiberglass layers and an intermediate non-woven fibrous layer to form a composite 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. The flexible composite may be used over a highly porous layer which is or acts as a dead air space relative to the composite.

REFERENCES:
patent: 3082143 (1963-03-01), Smith
patent: 3322233 (1967-05-01), McCluer et al.
patent: 3748799 (1973-07-01), Tough et al.
patent: 3783969 (1974-01-01), Pall
patent: 3858676 (1975-01-01), Masurier
patent: 3977492 (1976-08-01), Hankel

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