Shaft rub simulator

Details Shaft rub simulator Shaft rub simulator

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.

REFERENCES:
patent: 2898587 (1959-08-01), Nye
patent: 3092684 (1963-06-01), Frankel
patent: 3115535 (1963-12-01), Pastoriza et al.
patent: 3165734 (1965-01-01), Grodzinsky et al.
patent: 3165735 (1965-01-01), Aylett
patent: 3311868 (1967-03-01), Cupp et al.
patent: 3341697 (1967-09-01), Kaufman et al.
patent: 3795873 (1974-03-01), Fein

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