Concentric fluid acoustic transponder

Details Concentric fluid acoustic transponder Concentric fluid acoustic transponder

1997-08-13

1998-10-13

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Transponders

367131, H04B 159

Patent

active

058222723

ABSTRACT:
An acoustic transponder method and apparatus provides a high degree of frency 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.

REFERENCES:
patent: 2461181 (1949-02-01), Rosenberg
patent: 2465993 (1949-04-01), Beechly
patent: 2520520 (1950-08-01), Woodard
patent: 2716758 (1955-09-01), Hajecate
patent: 3195677 (1965-07-01), Hillery et al.
patent: 3397413 (1968-08-01), Houtsma
patent: 3447627 (1969-06-01), Buck et al.
patent: 3965234 (1976-06-01), Lane, Jr.
patent: 4126847 (1978-11-01), Etkins
patent: 4416509 (1983-11-01), Milan

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