Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1992-06-17
1993-07-20
Eldred, J. Woodrow
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
181117, 181118, G01V 106, G01V 138
Patent
active
052299775
ABSTRACT:
A closed-cycle combustion low-frequency acoustic pulse source for use underwater. An elongated combustion chamber, having a first end and a second end and an elongated elastic sleeve, is filled with a stoichiometric mixture of oxygen and hydrogen from an electrolyzer. When the mixture is ignited at the first end of the chamber, a longitudinally traveling flame front is initiated at the first end of the chamber. The moving front results in a traveling thermal pressure pulse. The pressure pulse is communicated to the surrounding underwater medium producing a generally uni-directional acoustic pressure pulse along the longitudinal axis of the elongated chamber. An alternative embodiment utilizes an array of sources disposed along the generally horizontal longitudinal axis of the array.
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Eldred J. Woodrow
Southwest Research Institute
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