Communications – electrical: acoustic wave systems and devices – Sonar counter-measures
Patent
1976-02-02
1991-07-02
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Sonar counter-measures
367135, H04B 106
Patent
active
050291432
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.
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patent: 3795873 (1974-03-01), Fein
Acks Robert S.
McCracken Howard B.
Watson Stanley J.
Fendelman Harvey
Keough Thomas G.
Pihulic Daniel T.
The United States of America as represented by the Secretary of
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