Towable VLF sonar projector

Details Towable VLF sonar projector Towable VLF sonar projector

1974-09-25

1976-01-13

Farley, Richard A.

Communications: electrical

Selective

Having indication or alarm

340 8PC, 340 9, H04R 144

Patent

active

039328350

ABSTRACT:
An improved line array transducer increases its effectiveness by ensuring a ore responsive trailing as it is towed through the water. An elongate sleeve contains a number of longitudinally spaced transducer elements which are responsive for the transmission or reception of acoustic energy. An interconnected, flexible bladder carried inside of a towing is coupled to the elongate sleeve. As the paravane leads the line array to its predetermined operational depth, the more compliant bladder yields to the pressure and is compressed. This compression of the bladder forces a contained gas into the interior of the elongate sleeve and the transducer's interiors to pressure compensate the array. By suitably choosing the materials and appropriately dimensioning the bladder, sleeve and transducer elements, an essentially neutrally buoyant line array is fabricated for deployment at the predetermined operational depth. Such an array trails responsively and does not generate excessive flow noise.

REFERENCES:
patent: 2429104 (1947-10-01), Olson
patent: 2978672 (1961-04-01), Barney
patent: 3480907 (1969-11-01), King

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