Accession Number:

ADA571677

Title:

Transport Theory for Propagation and Reverberation

Descriptive Note:

Corporate Author:

WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB

Personal Author(s):

Report Date:

2011-09-01

Pagination or Media Count:

8.0

Abstract:

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. Our objective in FY11 was to improve the generality of our previously developed shallow water propagation model based on transport theory to include reverberation. An additional objective in FY11 was to resolve a deficiency observed in previous results when transport theory was extended to include range dependent bottom depth in one-way propagation. The results showed a deficiency in the intensity of the field penetrating into the bottom in response to forward scattering from the sea surface. Transport theory, as we have developed it, can account for the effects of multiple forward scattering from boundary roughness. The emphasis of this work is on the mid-frequency range 1-10 kHz where effects of forward scattering can be important.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE