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URN	etd-0703117-123044
Author	Hsiu-pin Lin
Author's Email Address	No Public.
Statistics	This thesis had been viewed 5577 times. Download 68 times.
Department	Institute of Undersea Technology
Year	2016
Semester	2
Degree	Master
Type of Document
Language	zh-TW.Big5 Chinese
Title	The study of Acoustic Propagation in Dongsha Atoll
Date of Defense	2017-07-04
Page Count	114
Keyword	multipath effect Doppler effect Parabolic equation DongSha Atoll internal wave
Abstract	Huge internal solitary waves (ISW) and steep bathymetry around DongSha Atoll in the South China Sea was expected to affect sound propagation. Internal waves, generated from the Luzon Strait due to spring tide and neap tide propagate cross the basin area and hit the east wage of Atoll. In 2016, an acoustic experiment was conducted around the atoll by deploying three acoustic and one environmental moorings for learning the channel for both mid and low frequency signals, transmitted by an integrated sonar system. The paper is aimed to study channel-estimation of passband/baseband signals using pulse compression technique and surface ambiguity function to correct the Doppler Effect. Water column perturbed by environmental parameters such as sound speed, temporal variance, sediment property and bathymetries are aimed, and its impaction to channel passband/baseband response is also studied in this paper. Furthermore, parabolic equation was also used in this paper to study two- and three- dimensional acoustic wave transmission modeling. And also discuss how internal waves affect sound propagation and acoustic energy with acoustic sources in different water layer.
Advisory Committee	Hin-Kiu Mok - chair Yuan-Ying ,Chang - co-chair Mei-Chun ,Yuan - co-chair Linus Y.S Chiu - advisor
Files	etd-0703117-123044.pdf Indicate in-campus at 2 year and off-campus access at 2 year.
Date of Submission	2017-08-03

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