J. KIMS Technol Search

CLOSE


Journal of the Korea Institute of Military Science and Technology 2009;12(4):415-423.
Underwater Acoustic Environment and Low Frequency Acoustic Transmission in the Sub-Polar Front Region of the East Sea
Se-Han Lim, Gun-Hee Ryu
동해 아극전선 해역의 수중음향환경 및 저주파 음파전달 양상
임세한, 류건희
해군사관학교
Abstract
To investigate low frequency acoustic transmissions in the Sub-Polar Front(SPF) of the East Sea, numerical experiments are conducted with Range dependent Acoustic Model(RAM) using Circulation Research of the East Asian Marginal Seas(CREAMS) data and Autonomous Profiling Explorer(APEX)) data. Significant seasonal variations of sea water properties are existed across the Sub-Polar Front(SPF) region from the north and the south. The model results show that Transmission Loss(TL) decrease(about 20dB) with ideal front in the warm region whereas TL increase(about 25dB) with ideal front in the cold region. Regardless of season(both in summer and winter), when the sound source is located in the cold region of the SPF, the model results show weak TL, compared to the case of the source in the warm region(Maximum difference of TL reaches 28dB). This difference between the cases when the source is located in the cold region and the warm region, is accounted for from the different vertical profiles of sound speed in both regions.
Key Words: Sub-Polar Front, Acoustic Transmission Loss
TOOLS
Share :
Facebook Twitter Linked In Google+ Line it
METRICS Graph View
  • 391 View
  • 0 Download
Related articles in J. KIMS Technol.


ABOUT
ARTICLE CATEGORY

Browse all articles >

BROWSE ARTICLES
FOR CONTRIBUTORS
Editorial Office
160 Bugyuseong-daero 488beon-gil, Yuseong-gu, Daejeon 34060, Korea
Tel: +82-42-823-4603    Fax: +82-42-823-4605    E-mail: kimst@kimst.or.kr                

Copyright © 2024 by The Korea Institute of Military Science and Technology.

Developed in M2PI

Close layer
prev next