A numerical method for solving for normal modes with impedance bottom

This thesis describes the development of a computer program that calculates the propagation loss for low frequencies in a shallow ocean given the depth of source and receiver, the sound speed profile of the water, the frequency of the source, and the impedance and sound speed in the bottom. The program does this by computing the sum of normal modes for a specified set of boundary conditions. At the surface perfect pressure release is assumed, and the boundary condition at the bottom is one of impedance mismatch. An effort was made to develop a Fast Field Program, which would use a FFT to predict propagation loss at a variety of ranges by solving for a discrete set of wave numbers, but development was not completed.

Department dc:contributor.department

Engineering Acoustics Academic Committee

Year dc:date.issued

1986

Author dc:creator

• Cantley, Douglas

Advisors dc:contributor.advisor

• Coppens, Alan B.
• Gabrielson, Thomas B.

Statement dc:rights

• Copyright is reserved by the copyright owner

Language dc:language.iso

en_US

Handle dc:identifier.uri

https://hdl.handle.net/10945/22006

OAI identifier oai:identifier

oai:calhoun.nps.edu:10945/22006