Accession Number : ADA140213

Title :   Underwater Acoustic Propagation in the Korea Strait.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Park,S. H.

Report Date : SEP 1983

Pagination or Media Count : 136

Abstract : On 17 September 1983, a transmission loss (TL) experiment was conducted in the Korea Strait as a joint project between the Naval Air Development Center, U.S., and Agency for Defense Development, Korea. Two propagation paths were measured; the first parallel to the Korea Trench and the second across the trench. The TL, calculated by NADC is greater across the trench than parallel to the trench. A representative Sound Velocity Profile (SVP) was selected after examination of twelve locations close to the experimental track. This SVP, bottom type, and bathymetry were used in three computer models and the predictions of TL compared to experimental results. A split-step FFT parabolic equation model and a ray mode model shows little difference in the two directions. An implicit finite difference parabolic equation model showed a significant difference. Agreement along the path parallel to the trench was excellent when 30 dB were added to the experimental results. Agreement across the trench was less satisfactory.

Descriptors :   *Sound transmission, Korean Strait, Oceanographic data, Ambient noise, Transmission loss, Theses

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE