Multiple-frequency transducer

Details Multiple-frequency transducer Multiple-frequency transducer

1975-04-04

1976-04-20

Budd, Mark O.

Electrical generator or motor structure

Educational or construction units or kits

310 82, 310 83, 310 87, 310 9, 340 9, 340 10, H01L 4108

Patent

active

039522164

ABSTRACT:
A transducer comprising an array of prestressed, mass-loaded, piezoelectr low-frequency, transducer elements set within a housing, a thin alignment plate bonded to the planar radiating faces of the low-frequency transducer array, a pressure-release sheet bonded to the thin alignment plate, and a high frequency, planar, transducer array bonded to this pressure-release sheet. The high frequency transducer array in combination with its two backing layers forms an integral part of the low frequency transducer array during low frequency operation in addition to providing high frequency transmission and reception during high frequency operation. This transducer construction permits high transmitting and receiving sensitivities at widely separated frequencies.

REFERENCES:
patent: 2723386 (1955-11-01), Camp
patent: 2802196 (1957-08-01), Fry et al.
patent: 2829361 (1958-04-01), Crandell et al.
patent: 3478309 (1969-11-01), Massa, Jr.
patent: 3890591 (1975-06-01), Bocquillon et al.

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