Accession Number:

ADA220320

Title:

Determination of Noise Field Directionality Directly from Spatial Correlation for Linear Planar, and Volumetric Arrays

Descriptive Note:

Technical rept.

Corporate Author:

NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT

Personal Author(s):

Report Date:

1989-10-06

Pagination or Media Count:

48.0

Abstract:

The spatial correlation between two points of an array is given by a two-dimensional integral in terms of the noise field directionality. Depending on the dimensionality of the array, this integral equation can be partially solved, to yield explicit expressions for the noise field directionality in terms of a multi-dimensional Fourier transform. In particular, for a linear array, a one-dimensional collapsed field distribution can be determined for a planar array, the sum of symmetrically-arriving rays can be solved for and for a volumetric array, the complete filed can be found. The effects of finite length and discrete arrays on the estimate of the noise field directionality are also considered. JHD

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE