Accession Number : ADD015216

Title :   Wide Bandwidth Barrel Stave Projector.

Descriptive Note : Patent Application, Filed 28 Oct 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Obara, Robert J

Report Date : 28 Oct 1991

Pagination or Media Count : 7

Abstract : An underwater acoustical projector has its barrel staves located radially outward of a piezoelectric ceramic driver. The barrel staves are in an hour glass arrangement. The cross-sectional arrangement of the barrel staves is circular at both the top and bottom of the hour glass forming elliptical cross-sections of varying eccentricity between said top and bottom of said staves. The cross-section of greatest eccentricity is located midway between the top and bottom of said staves. The cross-section of greatest eccentricity is located midway between the top and bottom of the barrel staves. This forms a projector with a varying radius of curvature in each of the four 90 quadrants around the axis of the projector. This yields large changes in the resonant frequency. (Author)

Descriptors :   ACOUSTICS, CERAMIC MATERIALS, CURVATURE, DRIVES(ELECTRONICS), ECCENTRICITY, PIEZOELECTRIC MATERIALS, PIEZOELECTRICITY, RADIUS(MEASURE), RESONANT FREQUENCY, UNDERWATER, YIELD

Subject Categories : Acoustics
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE