Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1979-01-29
1980-10-14
Tudor, Harold J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367155, 367164, 310337, 310367, 310371, H04R 1700
Patent
active
042285321
ABSTRACT:
An electroacoustic transducer having high acoustic-to-electric energy conversion per unit volume. The transducer is in the form of a body having a cylindrical central section and hemispherical end sections, the central section and the end sections formed from active piezoelectric material and electrically interconnected with respect to a pair of output terminals wherein the polarizations of the central section and the end sections are arranged to convert acoustic pressure on the entire external surface area of said body to be effective in producing electrical energy. The physical parameters of each section are matched to produce essentially equal electrical characteristics of each section to form an inherently symmetrical transducer. The transducer has high sensitivity for a small size and is especially adapted for use in thin line towed arrays. The symmetrical form, polarities and balanced connections of the transducer provide cancellation of forces due to acceleration.
REFERENCES:
patent: 2618698 (1952-11-01), Janssen
patent: 2966656 (1960-12-01), Bigbie et al.
patent: 3266011 (1966-08-01), Massa
patent: 3560914 (1971-02-01), Webb
patent: 3617780 (1971-11-01), Benjaminson
patent: 3947802 (1976-03-01), Tims et al.
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