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Accession Number ADA571677
Title Transport Theory for Propagation and Reverberation.
Publication Date Sep 2011
Media Count 8p
Personal Author E. I. Thorsos
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.
Keywords Deficiencies
Efficiency
Forward scattering
Internal waves
Ocean surface
Reverberation
Roughness
Shallow water
Underwater acoustics
Wave propagation
Waveguides


 
Source Agency Non Paid ADAS
NTIS Subject Category 47C - Physical & Chemical Oceanography
46A - Acoustics
Corporate Author Washington Univ., Seattle. Applied Physics Lab.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1316
Contract Number N00014-10-1-0333

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