Cavitating parametric underwater acoustic source

Details Cavitating parametric underwater acoustic source Cavitating parametric underwater acoustic source

1974-10-22

1976-06-15

Farley, Richard A.

Communications: electrical

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Intelligence comparison for controlling

340 3A, H04B 1100, G01S 966

Patent

active

039640132

ABSTRACT:
A cavitating parametric underwater acoustic source for generating efficiey acoustic energy at low and medium frequencies. The source comprises a plurality of electro-acoustic transducer elements which are electrically energized in a liquid medium such as water at two or more primary frequencies. Changes in the ambient liquid pressure at or adjacent the transducer cause cavitation in the liquid medium which produces a high degree of non-linearity resulting in the generation of sum and difference frequencies of the primary frequencies in the liquid. The difference frequency is used to transmit acoustic energy efficiently in the liquid medium.

REFERENCES:
patent: 3612211 (1971-10-01), Clark
patent: 3622958 (1971-11-01), Tucker et al.
patent: 3786405 (1974-01-01), Charmiec et al.
patent: 3872421 (1975-03-01), Rogers et al.

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