Sonic transducer and method for making the same

Details Sonic transducer and method for making the same Sonic transducer and method for making the same

1988-04-05

1989-04-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310312, 310324, 310334, H01L 4108

Patent

active

048230421

ABSTRACT:
Sonic transducer and method for making the same. A sonic transducer of the type used in generating ultrasound frequencies for medical therapy includes a substantially planar circular piezoelectric crystal which is bonded to the rear surface of a circular metal diaphragm. The diaphragm front surface includes a substantially planar applicating face and an annular non-parallel surface surrounding the applicating face. The transducer may be excited to produce maximum ultrasound energy over a relatively broad frequency range.

REFERENCES:
patent: 3578995 (1971-05-01), Massa
patent: 3943388 (1976-03-01), Massa
patent: 4437032 (1984-03-01), Gelhard
NASA Technical Support Package on Broadband Ultrasonic Transducers for Mar./Apr. 1986, NASA Tech. Brief, vol. 10, No. 2, Item #50, FIG. 3(a), p. 1.

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