Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Noninterengaged fiber-containing paper-free web or sheet...
Patent
1986-05-21
1991-03-05
Lechert, Jr., Stephen J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Noninterengaged fiber-containing paper-free web or sheet...
181198, 181294, 181400, 181402, 367191, 428298, 428303, 428332, 428408, 428415, 428416, 4284239, 428458, 428465, 428480, 428492, 428494, B32B 506
Patent
active
049977059
ABSTRACT:
A laminate acoustic window for sonar systems having a pair of septa sandwiching a core therebetween, the core being made of a low shear high elongation to break material, the septa being formed of a relatively low density, high modulus material. The windows of the invention are characterizied by unusual freedom from attenuation loss over a wide frequency range. The windows are further substantially self damping and avoid thereby a generation of significant quantities of deleterious noise due to self generated vibration and transmitted vibration.
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Technical Memorandum, Oct. 23, 1978, U.S. Naval Applied Science Laboratory.
Properties of Sandwich-Type Structures as Acoustic Windows, Hickman et al., vol. 29, No. 7, Journal of Acoustical Society, (p. 858).
Caprette, Jr. Samuel J.
Golden Jonathan M.
Lai Jai L.
Ban Woodrow W.
Lechert Jr. Stephen J.
Ronyak David M.
The B. F. Goodrich Company
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