Transport Theory for Propagation and Reverberation

Abstract

The long-term goal is the development of computationally efficient modeling methods for shallow water propagation and reverberation that can account for the effects of multiple forward scattering from waveguide boundary roughness and volume heterogeneity such as internal waves. In FY11 our shallow water propagation model based on transport theory was extended to include reverberation, and it was found that sea surface forward scattering could have very important effects on reverberation level at mid frequencies, e.g., at 3 kHz. One objective in FY12 was to obtain some experimental verification of these important effects based on existing data. (A reverberation experiment planned for FY13 (TREX13) is being designed to give a more definitive verification.) An additional objective in FY12 was to use transport theory results to support the development of an effective surface reflection loss model that can approximately account for effects of surface forward scattering in ray-based or mode-based propagation and reverberation codes.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2012
Accession Number
ADA575123

Entities

People

  • Eric I. Thorsos

Organizations

  • University of Washington

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Phenomena
  • Acoustics
  • Amplitude
  • Backscattering
  • Data Sets
  • Equations
  • Forward Scattering
  • Frequency
  • Internal Waves
  • Monte Carlo Method
  • Physics Laboratories
  • Reflection
  • Reverberation
  • Scattering
  • Shallow Water
  • Surface Roughness
  • Transport Ships

Readers

  • Acoustical Oceanography.
  • Computational Fluid Dynamics (CFD)