Accession Number : ADD009624

Title :   Array Shading for a Broadband Constant Directivity Transducer.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Trott,W James ; Jarzynski,Jacek

Report Date : 04 May 1982

Pagination or Media Count : 6

Abstract : A broadband directional transducer which provides a beam pattern that is essentially constant for all frequencies above a certain cutoff frequency, an acoustic pressure angular distribution that is virtually independent of the distance from the transducer and no side lobes, includes an array of isophase, omnidirectional electroacoustic elements on a spherical shell, each element being amplitude-shaded according to the shading function.

Descriptors :   *Patents, *Electroacoustic transducers, Underwater acoustics, Nondestructive testing, Omnidirectional, Frequency, Sound pressure, Angles, Functions, Directional, Shadows, Broadband, Sidelobes, Distribution, Transducers

Subject Categories : Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE