Wide-range audio frequency underwater transducer

Details Wide-range audio frequency underwater transducer Wide-range audio frequency underwater transducer

1987-01-20

1988-08-09

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367175, 367172, 181110, H04R 1300

Patent

active

047633077

ABSTRACT:
A wide-range audio frequency underwater transducer is designed to make use of a massive small diameter vibratile piston driven by electromagnetic oscillatory forces to transmit omnidirectional uniform sound pressure level over the frequency range 100 Hz to 5 kHz. The rugged transducer design is adapted for low-cost mass production and can be used as a highly reliable expendable reference standard of source level for the calibration of in-situ stationary or moving sonar receiving systems. The magnitude of the source level can be accurately controlled by the magnitude of the electrical current supplied to the electrical winding over the entire frequency range of operation. A pressure equalization system is included in the design that permits use of the transducer at any depth down to 500 feet.

REFERENCES:
patent: 1640538 (1927-08-01), Du Bois-Reymond
patent: 2405179 (1946-07-01), Black et al.
patent: 2903673 (1959-09-01), Harris
patent: 2978669 (1961-04-01), Harris
patent: 3118125 (1964-01-01), Sims
patent: 3760346 (1973-09-01), Kieser et al.
patent: 4025912 (1977-05-01), Rice
patent: 4466083 (1984-08-01), Willard et al.
patent: 4607382 (1986-08-01), Dijkstra et al.

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