Composite transducer

Details Composite transducer Composite transducer

1987-04-13

1988-04-12

Kyle, Deborah L.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367165, 310337, 310800, H04R 100

Patent

active

047379391

ABSTRACT:
The composite transducer of this invention comprises a prior art longitudinal vibrator-type transducer for transmission of energy and a piezoelectric polymer hydrophone attached to the radiating face of the transducer for the receiving function. During transmission the receiver transducer is short-circuited, and during reception the transmitter transducer is terminated in an electrical impedance that optimizes receiver response and minimizes transducer self-noise. The frequency response of the polymer hydrophone is relatively flat and extends over a much greater frequency range than the transducer.

REFERENCES:
patent: 3425031 (1969-01-01), Klee
patent: 3716828 (1973-02-01), Massa
patent: 4191193 (1980-03-01), Leo
patent: 4354132 (1982-10-01), Borburgh et al.
patent: 4356422 (1982-10-01), Van Maanen
patent: 4433400 (1984-02-01), DeReggi et al.
McGrath et al., Recent Measurements on Improved Thick Film Piezoelectric P Volt Polymer material for Hydrophone Applications IEE Int. Symp. 6/83, pp. 1-8.

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