Accession Number : ADA304518

Title :   Bistatic Scattering and Depth Dependent Gas Fractions in the Acoustic Modeling of Gassy Sediment.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS

Personal Author(s) : Boyle, Frank A. ; Chotiros, Nicholas P.

PDF Url : ADA304518

Report Date : 07 SEP 1995

Pagination or Media Count : 37

Abstract : A model for acoustic scattering from the seabed was previously developed by Boyle and Chotiros (ARL-TR-93-15, 'Bottom Backscatter from Trapped Bubbles' and ARL-TR-94-21, 'Bottom Backscatter from Trapped Bubbles II'). The model treats acoustic scattering as a sum of three independent processes, including scattering from the sediment interface, volume scattering from sediment grains, and volume scattering from trapped gas bubbles that might exist between grains. Recently the gas bubble component of this model has been modified to allow for bistatic scattering and depth dependent sediment gas fractions. The theories behind these modifications are described, and in each case the character of the resulting model studied. jg

Descriptors :   *SCATTERING, *BACKSCATTERING, *GASES, *ACOUSTIC SCATTERING, *SEDIMENTS, *BISTATIC DETECTION, VOLUME, MODELS, INTERFACES, BUBBLES, ACOUSTICS, LITTORAL ZONES, OCEAN BOTTOM, TRAPS, BISTATIC RADAR, MINE WARFARE.

Subject Categories : Physical and Dynamic Oceanography
      Defense Systems
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE