Accession Number:

AD0768061

Title:

Time Varying Sound Propagation Models.

Descriptive Note:

Final rept. 1 May 71-31 Jan 73,

Corporate Author:

INSTITUTE FOR ACOUSTICAL RESEARCH MIAMI FLA

Personal Author(s):

Report Date:

1973-09-24

Pagination or Media Count:

11.0

Abstract:

The final report covers work on time-varying ray propagation models of sound transmission in the Straits of Florida. The report is supplementary to a final report of 1 June 1973, Transmission Fluctuations, IAR 73001, AD - 763421, which covers 12 years of work on phase-stable propagation and includes 8 publications on the principal results obtained. Time-varying ray propagation is modeled with relatively simple channels having plane parallel boundaries and the mean depths of the sound paths. When time-varying sound speed profiles derived from measured temperature-depth profiles were used in the models, calculated variations with time of the amplituded and phase of transmitted waves corresponded well with observations. The results indicate that medium-related changes in propagation can be modeled successfully with simple acoustic-environmental models. Author

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE