Method and apparatus for sensing sound waves in a fluid medium

Details Method and apparatus for sensing sound waves in a fluid medium Method and apparatus for sensing sound waves in a fluid medium

1991-06-21

1992-07-21

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367172, 25022717, 385123, 359285, H04R 102

Patent

active

051329417

ABSTRACT:
A method and apparatus (10) for sensing sound in a fluid medium. The apparatus (10) includes an element (12) for generating polarized light having a predetermined plane of polarization. In addition, the apparatus (10) further includes an element (14) for rotating the plane of polarized light in response to sound waves propagating in the fluid medium, as well as an element (32) for detecting the polarized light. Finally, the apparatus (10) includes an element (34) for generating a signal from the output of the detecting element (32) which is indicative of the amplitude and frequency of the sound waves.

REFERENCES:
patent: 4322829 (1982-03-01), Davis, Jr. et al.
patent: 4442350 (1984-04-01), Rashleigh
patent: 4593385 (1986-06-01), Chamuel
patent: 4868799 (1989-09-01), Massa
patent: 4922095 (1990-05-01), Gergely
patent: 4951271 (1990-08-01), Garrett et al.

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