Sound Propagation Study.
RAYTHEON CO NEW LONDON CT MARINE RESEARCH LAB
Pagination or Media Count:
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.
- Fluid Mechanics