Acceleration balanced hydrophone II

Details Acceleration balanced hydrophone II Acceleration balanced hydrophone II

1976-10-21

1979-07-24

Tudor, Harold J.

Communications: electrical

Selective

Interrogation response

340 9, H04B 1300

Patent

active

041624769

ABSTRACT:
A hydrophone which provides for cancellation of signals caused by acceleration forces and variations in water pressure head. The structure is comprised of a transducer for sensing an acoustic pressure wave as well as an acceleration force, and an accelerometer, which is isolated from the acoustic pressure wave, for sensing only the acceleration force. The transducer and the accelerometer are connected so as to subtract the acceleration output. Only the acoustic pressure wave output signal remains. Circuitry is also provided for cancelling the pressure head signal.

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patent: 3781781 (1973-12-01), Groves, Jr.
patent: 3832762 (1974-09-01), Johnston et al.
patent: 3988620 (1976-10-01), McDavid
patent: 4017824 (1977-04-01), Fife

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