High fidelity low frequency transducer for use at great depth

Details High fidelity low frequency transducer for use at great depth High fidelity low frequency transducer for use at great depth

1977-02-28

1977-12-13

Tudor, Harold

Communications: electrical

Selective

Having indication or alarm

340 7R, 340 10, H04B 1300

Patent

active

040632156

ABSTRACT:
A hose-like hydrophone array is insensitive to ambient pressure variations hile retaining an acceptable performance capability. Ferroelectric cylinders mount rigid cylinders at opposite ends and are separated by elongate lengths of corrugated tubing. A dielectric oil fills the cylinders and lengths of corrugated tubing to make the array relatively insensitive to pressure variations. Since the dielectric oil is several times (five to 10) more compressible than the ambient water, the ferroelectric elements can more compliantly respond to a broader bandwidth of impinging or radiated acoustic energy. The radially rigid lengths of tubing hold a greater volume of the relatively compressible oil to permit this response.

REFERENCES:
patent: 2717369 (1955-09-01), Bardeen et al.
patent: 2791757 (1957-05-01), Blake et al.
patent: 2837731 (1958-06-01), Harris
patent: 2983901 (1961-05-01), Paslay et al.
patent: 3432000 (1969-03-01), Ongkiehong et al.
patent: 3518677 (1970-06-01), Florian

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