Acoustic wave transmitter-receiver

Details Acoustic wave transmitter-receiver Acoustic wave transmitter-receiver

1976-06-24

1978-08-08

Farley, Richard A.

Communications: electrical

Selective

Monitoring in addition to control

340 9, G01S 966, H04R 140

Patent

active

041059913

ABSTRACT:
Acoustic wave transmitter-receiver comprising at least one pair of transducer assemblies arranged symmetrically with respect to a vertical axis, the transducers of each assembly being lined up with a regular spacing such that the projection length thereof on the vertical axis is equal to a whole number of wave lengths of the transmitted acoustic waves, means for generating transmission signals and means for transmitting the latter, in phase opposition, to the two transducer assemblies of said pair.

REFERENCES:
patent: 3691513 (1972-09-01), Stedtnitz
patent: 3781774 (1973-12-01), Delignieres

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