Accession Number : ADA292424

Title :   Ambiguity Surface Manifestation of Downslope Converted Noise Sources.

Descriptive Note : Technical memo.,

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB

Personal Author(s) : Tran, Jean-Marie Q. ; Hodgkiss, W. S.

PDF Url : ADA292424

Report Date : JAN 1994

Pagination or Media Count : 58

Abstract : This report deals with the manifestation of downslope converted continental shelf noise sources in the matched-field processor (MFP) ambiguity surface. Of interest here is how noise sources outside the range of interest leak into the ambiguity surface through the sidelobe structure of the effective MFP beam (or cell) pattern. The focus is on the appearance of the matched field processing ambiguity surface due to continental shelf noise, primarily ships, that gets coupled in the deep sound channel. This study is carried out with simulations using the parabolic equation (PE) model. PE is used to simulate the pressure field across a receiving vertical line array in deep water (4OOOm), 1750 km from the continental shelf. (AN)

Descriptors :   *CONTINENTAL SHELVES, *UNDERWATER SOUND, CONVERSION, COMPUTERIZED SIMULATION, SHALLOW WATER, BATHYMETRY, CORRELATION, ACOUSTIC ARRAYS, SOUND TRANSMISSION, SLOPE, LINEAR ARRAYS, AMBIENT NOISE, ACOUSTIC VELOCITY, SOUND PRESSURE, DEEP WATER, SIDELOBES, ACOUSTIC FIELDS, TRANSMISSION LOSS, SOUND RANGING, ACOUSTIC CHANNELS.

Subject Categories : Acoustics
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE