Acoustic filter

Details Acoustic filter Acoustic filter

1976-07-01

1980-08-05

Hunt, Brooks H.

Acoustics

Sound-modifying means

Sound absorbing panels

181284, E04B 162

Patent

active

042157641

ABSTRACT:
An acoustical insulating material comprises a fiber reinforced lead composite sheet or panel. In a preferred embodiment of the invention the fibers are substantially axially parallel aligned with one another. The frequency absorption and transmission characteristics of the material may be varied by mechanically stressing the material, e.g. as by placing the material under tension in the direction of fiber orientation.

REFERENCES:
patent: 3087569 (1963-04-01), Kurtze
patent: 3239973 (1966-03-01), Hannes et al.
patent: 3738447 (1973-06-01), Rose
patent: 3860443 (1975-01-01), Lachman et al.
patent: 3894863 (1975-07-01), Lachman et al.
patent: 3918141 (1975-11-01), Pepper et al.
Richardson, Technical Aspects of Sound 1953 pp. 80-84.

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