Acoustic Bottom Profiler with a Differential Output Receiver

N. A. Rimskii-Korsakov and V. A. Sychev

Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia

Received August 6, 1996

Abstract—A special amplifier used in an acoustic profiler with an operating frequency of 5 kHz was developed
at the Laboratory of Bottom Hydrolocation of the Shirshov Institute of Oceanology, Russian Academy of Sci-
ences. The differential output involves two circuits, which filter the envelope of the echo-signal within different
frequency bands, and a subtraction device. This solution for amplifier circuitry makes it possible to substantially
improve the signal-to-noise ratio while profiling bottom sediments in shallow waters. The results of the exper-
iment obtained with the new amplifier and tests concerning detection of a test object buried in sandy ground are
given.

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