US 4,353,120 A · Low-frequency sound source for towed array condition appraiser system (TACAS)

Abstract

An improvement for an apparatus for calibrating or otherwise determining low frequency operational parameters of an elongate hose-like array is compact enough to be mounted on a cart-like member which is free to travel the length of the array. The improvement is in the form of a pair of oppositely extending tubes each having a reciprocating element for ensonifying selective portions of the elongate array with low frequency energy. Having the reciprocating elements 180.degree. moving out of phase with respect to one another to exhibit mirror image excursions and at least one flexible radiating surface proximately located to the array assures that performance compromising vibrations are nullified and that low frequency energy is responsively received by the individual transducer elements along the array's length.

Claims11

Dependent claims

In an apparatus for enabling an in situ determination of operational parameters of an elongate array of spaced acoustic elements covered by a hose-like sheath on which a longitudinally displaceable member is adapted to travel, an improvement therefor is provided comprising:

means mounted on the longitudinally displaceable member for ensonifying the spaced acoustic elements with acoustic energy in the low frequency range as it moves along the array, the low frequency ensonifying means is provided with first and second tubes each having one open end extending outwardly from the array and the other open end positioned adjacent the elongate array and a projector of acoustic energy is disposed in each tube to ensonify the spaced acoustic elements with low frequency acoustic energy.

Dependencies are inferred from the claim text.

Low-frequency sound source for towed array condition appraiser system (TACAS)

Life of this patent

Low-frequency sound source for towed array condition appraiser system (TACAS)

Life of this patent

Abstract

Claims11