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US 5,392,258 AGranted
Underwater acoustic intensity probe
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsThomas B. Gabrielson, James F. McEachern, Gerald C. Lauchle
Life of this patent
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Abstract
An underwater probe for determining true acoustic intensity by the direct asurement of true acoustic velocity and true acoustic pressure in a neutrally buoyant package, utilizes a moving-coil geophone embedded in a casting of syntactic foam and a pair of hydrophones on the exterior of the casting.
Claims8
An underwater probe for determining true acoustic intensity, comprising:
- a moving-coil geophone for sensing acoustic velocity;
- a rigid foam cast around said moving-coil geophone, said rigid foam having an outer surface;
- a plurality of hydrophones integrated on said outer surface of said rigid foam for measuring acoustic pressure;
- wherein said moving-coil geophone, said rigid foam, and said plurality of hydrophones constitute a neutrally buoyant package in water;
- and
- means operatively connecting to said moving-coil geophone and said plurality of hydrophones for computing a time-averaged product of the acoustic velocity and the acoustic pressure.
3 more elements
An underwater probe for determining true acoustic intensity, comprising:
- a moving-coil geophone for measuring acoustic velocity, said moving-coil geophone having a sense axis;
- a syntactic foam cast around said moving-coil geophone, said syntactic foam having a density less than that of water and being strong enough to withstand high hydrostatic pressure;
- two hydrophones externally mounted on said syntactic foam for measuring acoustic pressure, said hydrophones being located on opposite ends of the syntactic foam along the sense axis of the moving-coil geophone;
- wherein the moving-coil geophone, the syntactic foam, and the two hydrophones constitute a neutrally buoyant package in water;
- and
- means operatively connected to the moving-coil geophone
- and the two hydrophones for computing a time-averaged product of acoustic velocity and acoustic pressure.
4 more elements
Dependencies are inferred from the claim text.