Accession Number : ADA294593

Title :   Bottom Scattering In Acoustic Propagation Modeling.

Descriptive Note : Final rept.,

Corporate Author : TULANE UNIV NEW ORLEANS LA

Personal Author(s) : Purrington, Robert D.

PDF Url : ADA294593

Report Date : FEB 1994

Pagination or Media Count : 39

Abstract : The problem of propagating acoustic energy in the ocean subject to boundary roughness is considered. Both a small range-step 'Monte Carlo' approach in which the acoustic signal is scattered from an ocean bottom consisting of the deterministic bathymetry with a stochastic component superimposed, and a scattering kernel method, in which the pressure field vector is analyzed at each range-step and modified by application of a scattering operator, are discussed. Results of computations using the former are presented. A higher-order, energy-conserving, finite-element parabolic equation model is used.

Descriptors :   *SURFACE ROUGHNESS, *ACOUSTIC SIGNALS, *ACOUSTIC SCATTERING, *OCEAN BOTTOM, MATHEMATICAL MODELS, PROPAGATION, COMPUTATIONS, STOCHASTIC PROCESSES, ACOUSTIC WAVES, FINITE ELEMENT ANALYSIS, MONTE CARLO METHOD, BOUNDARIES, BATHYMETRY, SOUND TRANSMISSION, PRESSURE, OPERATORS(MATHEMATICS), OCEANS, EQUATIONS, OCEAN MODELS, DETERMINANTS(MATHEMATICS), PARABOLIC BODIES.

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE