Accession Number : AD0772092

Title :   Beam Patterns and Directivity Indices of Parametric Acoustic Arrays.

Descriptive Note : Technical memo.,

Corporate Author : NAVAL UNDERWATER SYSTEMS CENTER NEWPORT R I

Personal Author(s) : Childs,Donald R.

Report Date : 28 DEC 1973

Pagination or Media Count : 23

Abstract : Using an approximate model for the saturated primary beam, the authors calculated the beam patterns and directivity indices of parametric acoustic arrays. Several curves of the beam patterns and of the directivity index are displayed as a function of the above parameters. It is seen that the half-power beam width is too wide in this model and that the directivity index decreases with increasing primary source level. (Modified author abstract)

Descriptors :   *Sonar arrays, *Acoustic beams, Patterns, Graphs

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE