Cavitation-resistant sonar array

Details Cavitation-resistant sonar array Cavitation-resistant sonar array

1998-09-17

2000-04-18

Dang, Khanh

Acoustics

Geophysical or subsurface exploration

Seismic source and detector

181110, G01V 100

Patent

active

060503610

ABSTRACT:
A cavitation-resistant sonar array having reduced spacing between transdu elements is provided. The array has a series of transducer elements attached to an array fixture with spacing between elements being fixed at one-quarter wavelength or closer. Cavitation caused by this close spacing is eliminated 11 by replacing the water spaces between elements with a rho-c rubber which matches the acoustic impedance, z, of water, that is z=.rho.c. The rho-c material is bonded to element to prevent loss of contact between the element and the spacer. A processing computation correcting signal data is provided to account for any differences in the speed of sound, c, in the rho-c material when compared to the speed of sound in water.

REFERENCES:
patent: 4271490 (1981-06-01), Minohara et al.
patent: 5426619 (1995-06-01), Madden et al.

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