Increased effective aperture for receive arrays

Details Increased effective aperture for receive arrays Increased effective aperture for receive arrays

2008-03-25

2008-03-25

Lobo, Ian J. (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Underwater system

C367S176000

Reexamination Certificate

active

11217838

ABSTRACT:
A sonar dome having an acoustic array housed therein. A plurality of bubbles are generated within the fluid inside the sonar dome. The generated bubbles are of an amount and size to reduce the speed of sound within the sonar dome fluid. Reduction of the speed of sound within the sonar dome fluid effectively increases the aperture of the acoustic array. The bubbles can be generated from a gas source or electrolytically. Typically, each individual bubble is less than 0.01 mm in diameter to reduce bubble velocity in the fluid.

REFERENCES:
patent: 4333169 (1982-06-01), Hoyt
patent: 4625302 (1986-11-01), Clark
patent: 5999491 (1999-12-01), Harvey et al.
patent: 6341661 (2002-01-01), Bick et al.

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