Research/Patents/US 4949317
US 4949317

Assignee

Filed

Feb 27, 1967

Granted

Aug 14, 1990

Location

Abstract

An improved acoustic baffle for use with underwater hydrophone or acoustic transducer equipment on submarines and the like for attenuating acoustic energy of a noise character emanating from the submarine carrying the hydrophone equipment thereby rendering the hydrophone immune to undesired ambient noise conditions, incorporates a laminated assembly of compliant or spring like elements. One embodiment is characterized by a ribbed member for effecting a spacing of a plurality of rubber tubing type sound absorbing elements. An alternative embodiment incorporates a plurality of metallic springs for controlled compliancy of the baffle. The assembled elements are attached to a steel plate and before being placed in operation, a hydrophone or acoustic transducer is mounted on the opposite side of the steel plate.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Oct 28, 1981

Rescinded

Apr 5, 1990

Duration

8 years, 5 months

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records