Underwater Sound Propagation-Loss Program. Computation by Normal Modes for Layered Oceans and Sediments.

Abstract

A normal-mode program for a sound-speed profile of an arbitrary number of layers has been constructed. It has been used extensively and successfully for 12 years to compute sound propagation in idealized underwater acoustic ducts. Documentation is contained for those who wish to use or modify this program. The FORTRAN statements are given for both the normal-mode and a mode-follower program. The numerical anaysis necessary for computing modified Hankel functions of order 1/3 is given. The analysis includes a continued fraction technique. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 17, 1979
Accession Number
ADA072201

Entities

People

  • D. Gordon

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Acoustic Waves
  • Acoustics
  • Applied Mathematics
  • Asymptotic Series
  • Complex Numbers
  • Computations
  • Computer Programs
  • Computers
  • Curve Fitting
  • Differential Equations
  • Equations
  • Frequency
  • Numerical Analysis
  • Operating Systems
  • Phase Velocity
  • Physics Laboratories

Fields of Study

  • Mathematics

Readers

  • Computational Modeling and Simulation
  • Wave Propagation and Nonlinear Chaotic Dynamics.