Accession Number : ADA331715

Title :   Method and Apparatus for Frequency Filtering Using an Elastic, Fluid-Filled Cylinder

Descriptive Note : Patent application, filed 29 May 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Peloquin, Mark S.

PDF Url : ADA331715

Report Date : 29 MAY 1997

Pagination or Media Count : 18

Abstract : A method and system are provided for frequency filtering compressional wave energy. An elastic cylinder is filled with a fluid that is selected based on a fluid density p and a dilatational wave phase velocity ci 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 p and the dilatational wave phase velocity ci. Further tuning of the first radial resonance frequency can be achieved by adjusting the radial wall thickness of the elastic cylinder.

Descriptors :   *PATENT APPLICATIONS, *HYDROPHONES, *LOW PASS FILTERS, PRESSURE GRADIENTS, SIGNAL PROCESSING, TOWED ARRAYS, RESONANT FREQUENCY, CYLINDRICAL BODIES, ACOUSTIC ARRAYS, FILTER ANALYSIS, PHASE VELOCITY, FLUID FILTERS.

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE