Research/Patents/US 5029143
US 5029143

SHAFT RUB SIMULATOR

Assignee

Filed

Feb 2, 1976

Granted

Jul 2, 1991

Location

CA US

Abstract

A synthesizer for complex acoustic signatures includes a generator for an ectrical analog of a complex acoustic waveform corresponding the the "shaft rub" noise produced by the interaction of a marine propeller shaft and a stern tube or other through-the-hull marine fitting. This circuitry employs digital random generators to produce a nonrecurring characteristic signal synthesizing this acoustic noise. An arrangement to process this signal with other simulation circuitry is also disclosed.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Dec 3, 1981

Rescinded

Nov 1, 1990

Duration

8 years, 11 months

Inventor

  • 1HOWARD B. MC CRACKEN

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