Multi-layered acoustic liner

Details Multi-layered acoustic liner Multi-layered acoustic liner

1974-04-02

1976-04-06

Hix, L. T.

Acoustics

Auditorium

181 33H, 181 56, 181 33D, 415119, E04B 199

Patent

active

039483460

ABSTRACT:
This invention concerns a multi-layered acoustic liner which breaks up high amplitude sound and shock waves into several waves of the same type but smaller amplitudes, converting some acoustic energy into heat and shifting part of the acoustic energy to a higher frequency level to achieve better absorption by the atmosphere. The sandwich-type perforated plate acoustic liner comprises several layers of honeycomb backing material which are separated by thin perforated sheets.

REFERENCES:
patent: 3380206 (1968-04-01), Barnett
patent: 3439774 (1969-04-01), Allawat et al.
patent: 3481427 (1969-12-01), Dobbs et al.
patent: 3542152 (1970-11-01), Adamson
patent: 3670843 (1972-06-01), Kelly et al.
patent: 3734234 (1973-05-01), Wirt
patent: 3769767 (1973-11-01), Scott

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