Modal Acoustic Transmission Loss (MOATL): A Transmission-Loss Computer Program Using a Normal-Mode Model of the Acoustic Field in the Ocean.

Abstract

A FORTRAN program which calculates coherent and incoherent acoustic transmission loss is described. The program is based on normal-mode theory of ocean acoustics. The theory models the ocean as two fluid layers, each with an arbitrary sound-speed profile, which overlay a uniform half-space. The half-space may be a fluid or a shear-supporting solid. The model incorporates losses due to acoustic absorption in all three media and losses due to roughness of the upper and lower boundaries of the upper fluid layer. An acoustic environment changing slowly with range is treated using the adiabatic approximation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 27, 1980
Accession Number
ADA089367

Entities

People

  • John F. Miller
  • Stephen N. Wolf

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Accuracy
  • Acoustic Fields
  • Acoustic Properties
  • Acoustic Waves
  • Acoustics
  • Computer Programming
  • Computer Programs
  • Computers
  • Dynamic Range
  • Extrapolation
  • Fluids
  • Military Research
  • Phase Velocity
  • Plastic Explosives
  • Precision
  • Water

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Structural Dynamics.

Technology Areas

  • Space