Underwater piezoelectric arrangement

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type

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367159, 367169, 310337, 310800, G01V 138

Patent

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048414948

ABSTRACT:
Underwater piezoelectric arrangement in which it comprises two piezoelectric elements made of piezoelectric ceramic-polymer composites and juxtaposed to form a single layer structure, one of the element(s) having larger hydrophone constant than that of the other element(s), and by noise cancelling of the piezoelectric assembly there can be selectively detected only charges or voltages generated by acoustic waves which acts on each element.

REFERENCES:
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patent: 3860899 (1975-01-01), Watlington
patent: 4183010 (1980-01-01), Miller
patent: 4194198 (1980-03-01), Redfern
patent: 4354132 (1982-10-01), Borburgh et al.
patent: 4376302 (1983-03-01), Miller
patent: 4406323 (1983-09-01), Edelman
patent: 4461179 (1984-07-01), Holt
patent: 4523471 (1985-06-01), Lee
patent: 4695988 (1987-09-01), Banno
IEEE 1984 Ultrasonic Symposium Proceedings.

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