Ultrasonic transducer and attenuating material for use therein

Details Ultrasonic transducer and attenuating material for use therein Ultrasonic transducer and attenuating material for use therein

1981-12-30

1985-07-09

Cangialosi, S. A.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

310327, 367176, H04R 1700

Patent

active

045286523

ABSTRACT:
An improved material for an ultrasonic transducer assembly having improved noise suppression characteristics comprising an ultrasonic transducer having a plurality of surfaces, a housing for receiving said transducer whereby one surface of said transducer is free to transmit and receive ultrasonic waves, and a material positioned about said transducer and between said transducer and the environment or housing for attenuating ultrasonic energy, said material comprising a heavily loaded resin based on an unfilled low viscosity potting gel and a filler selected from the group consisting of heavy oxides, metal powders, and density lowering fillers. In specific embodiments lead oxide, tungsten powder, and glass microspheres have been used as the filler in a silicone or flexible epoxy.

REFERENCES:
patent: 2881336 (1959-04-01), Elion
patent: 2972068 (1961-02-01), Howry et al.
patent: 3515910 (1970-06-01), Fritz et al.
patent: 3546012 (1970-12-01), Dixon et al.
patent: 3794866 (1974-02-01), McElroy et al.
Beerman, "Optimizing Matching Layers for a Three-Section Broad-Band Piezoelectric PZT-5A Transducer Operating into a Wafer", IEEE Transactions on Sonics and Ultrasonics, vol. SU-28, No. 1, Jan. 1981, p. 53.

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