Accession Number : ADA181801

Title :   A Transfer Function Approach to Scalar Wave Propagation in Lossy and Lossless Media.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Merrill,Timothy D

PDF Url : ADA181801

Report Date : Mar 1987

Pagination or Media Count : 72

Abstract : This thesis investigates the feasibility of micro-computer based simulation of scalar wave propagation in various media. Models for lossless media and media with a loss coefficient which is linear in frequency have been coded in FORTRAN and simulated successfully on a commercially available micro-computer, with simulation times less than 30 minutes. The spatial impulse responses for classical problems using square and circular-piston excitation are presented graphically, along with new, innovative, spatial excitation source shapes. Keywords include: Acoustic imaging, Lossy media, Ultrasonic, Propagation, Transfer functions, and Linear systems.

Descriptors :   *TRANSFER FUNCTIONS, *ACOUSTIC IMAGES, *ACOUSTIC SCATTERING, IMAGES, LINEAR SYSTEMS, LOSSES, MICROCOMPUTERS, PULSES, SPATIAL DISTRIBUTION, FORTRAN, COEFFICIENTS, SCALAR FUNCTIONS, WAVE PROPAGATION, EXCITATION, SHAPE, SOURCES, THESES, COMPUTERIZED SIMULATION, ULTRASONICS, FAST FOURIER TRANSFORMS, BESSEL FUNCTIONS

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE