Sound Propagation Study.

Abstract

The Fast Field Program (FFP) is a numerical method of evaluating the exact solution of the acoustical wave equation. Modern numerical techniques, such as the Fast Fourier Transform and a generalization of this, the Chirp Fourier Transform, make possible the direct integration of wave solutions expressed in certain integral forms. Two formulations for harmonic point sources in layered inhomogeneous media are developed. These include a general numerical method which allows arbitrary velocity profiles that need not be approximated by analytic functions nor divided into layers, and which permit wave field computations as functions of both range and depth. Extensions are developed for spatially distributed sources and for velocity profiles and boundary conditions which vary in range.

Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1970
Accession Number
AD0869673

Entities

People

  • Stanley G. Chamberlain

Organizations

  • RTX

Tags

DTIC Thesaurus Topics

  • Analytic Functions
  • Boundaries
  • Computations
  • Convolution Integrals
  • Differential Equations
  • Equations
  • Fast Fourier Transforms
  • Integrals
  • Inverse Problems
  • Mathematical Analysis
  • Mathematics
  • Partial Differential Equations
  • Wave Equations

Readers

  • Calculus or Mathematical Analysis
  • Wave Propagation and Nonlinear Chaotic Dynamics.