The use of the Parabolic Equation Method in Sound Propagation Modelling,

Abstract

The parabolic equation method (PE method) is the latest major development in the field of acoustic modelling. A detailed description of the derivation of the parabolic equation from the wave equation is given together with a description of a marching solution technique based on Fast Fourier Transforms (FFT). Limitations on the method in terms of allowable step length in range, number of FFT points to be used, and restrictions on pressure field behaviour in order to obtain a stable solution, are mentioned. Furthermore, numerical examples of propagation predictions are given for both shallow and deep water cases, with and without bottom absorption, and for both range-dependent and range-independent environmental conditions.

Document Details

Document Type
Technical Report
Publication Date
Aug 15, 1975
Accession Number
ADA016847

Entities

People

  • Finn Jensen
  • Hans Krol

Organizations

  • SACLANT ASW Research Centre

Tags

DTIC Thesaurus Topics

  • Absorption
  • Deep Water
  • Differential Equations
  • Equations
  • Fast Fourier Transforms
  • Mathematics
  • Partial Differential Equations
  • Water
  • Wave Equations

Fields of Study

  • Engineering

Readers

  • Acoustical Oceanography.
  • Approximation Theory.
  • Computational Fluid Dynamics (CFD)