Concentric Fluid Acoustic Transponder
Patent, Filed 13 Aug 97, patented 13 Oct 98
DEPARTMENT OF THE NAVY WASHINGTON DC
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An acoustic transponder method and apparatus provides a high degree of frequency and target strength selectivity by utilizing two or more concentrically disposed, hollow spheres each containing acoustically refractive fluids. The invention provides the possibility of using spheres of a variety of diameters and as well a number of different refractive fluids, enabling the production of an acoustic transponder having a wide variety of selective frequency responses as well as effective target diameters.
- Acoustic Detection and Detectors
- Underwater and Marine Navigation and Guidance