Communications – electrical: acoustic wave systems and devices – Echo systems
Patent
1981-12-03
1984-03-27
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
367101, G01S 1504
Patent
active
044398450
ABSTRACT:
A sonar system for positive identification of certain resonant body targets such as mines. Two acoustic signals of different frequencies are transmitted toward the target and the acoustic returns are separated into the component frequencies, detected, and thereafter subtracted from one another. A signal, above a threshold value, resulting from the subtraction is indicative of a resonant body target and the indication is displayed and/or recorded.
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Geohegan, Jr. Kenneth P.
Gruen Henry M.
Farley Richard A.
Schron D.
Westinghouse Electric Corp.
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