Method and apparatus for frequency filtering using an elastic fl

Details Method and apparatus for frequency filtering using an elastic fl Method and apparatus for frequency filtering using an elastic fl

1997-05-29

1998-07-14

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

367153, 367154, 367106, 367130, H04R 1700

Patent

active

057815062

ABSTRACT:
A method and system are provided for frequency filtering compressional wave nergy. An elastic cylinder is filled with a fluid that is selected based on a fluid density .rho..sub.i and a dilatational wave phase velocity c.sub.i thereof. When the elastic cylinder so-filled is subjected to a compressional wave propagating in a fluid environment, a first radial resonance frequency of the elastic cylinder is controlled by the fluid density .rho..sub.i and the dilatational wave phase velocity c.sub.i. Further tuning of the first radial resonance frequency can be achieved by adjusting the radial wall thickness of the elastic cylinder.

REFERENCES:
patent: 5532979 (1996-07-01), Hansen et al.
patent: 5550791 (1996-08-01), Peloquin

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