Low frequency hydrophone

Details Low frequency hydrophone Low frequency hydrophone

1978-05-10

1980-02-12

Tudor, Harold J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367166, H04B 1300

Patent

active

041886097

ABSTRACT:
A fluid-filled compliant tube immersed in seawater to detect low frequency sound waves. The tube has only a middle portion of its length exposed to incident acoustic energy waves and a mode conversion causes a corresponding frequency acoustic wave in the tube, but of greatly reduced wavelength. Transducers are positioned at either end of the tube to detect the waves in the tube, the length of which is chosen to be a half wavelength of the waves in the tube.

REFERENCES:
patent: 2164858 (1939-07-01), West
patent: 2438925 (1948-04-01), Krantz
patent: 3187300 (1965-06-01), Brate
patent: 3205476 (1965-09-01), Massa
patent: 3438021 (1969-04-01), Nelkin et al.
patent: 3872421 (1975-03-01), Rogers

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