Measurement of Horizontal Coherence Using a Line Array in Shallow Water
- Title
- Measurement of Horizontal Coherence Using a Line Array in Shallow Water
- Author
- 나정열
- Keywords
- Acoustic fields; Horizontal coherence; Internal waves; Beamforming; Bearing disturbance; Array signal gain degradation
- Issue Date
- 2003-06
- Publisher
- 한국음향학회
- Citation
- 한국음향학회지, v. 22, no. 2, page. 78-86
- Abstract
- We analyzed the measured acoustic field to explore the characteristics of a horizontal coherence in shallow water. Signal spatial coherence data were obtained in the continental shelf off the east coast of Korea using a horizontal line array. The array was deployed on the bottom of 130 m water depth and a sound source was towed at 26 m depth in the source-receiver ranges of 1-13 ㎞. The source transmitted 200 ㎐ pure tone. Topography and temperature profiles along the source track were measured to investigate the relationship between the horizontal coherence and environment variations. The beam bearing disturbance and array signal gain degradation is examined as parameters of horizontal coherence. The results show that the bearing disturbance is about ± 8° and seems to be affected by temporal variations of temperature caused by internal waves. The array signal gains show degradation more than 5㏈ by the temporal and spatial variations of temperature and by the down-sloped topography.
- URI
- https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=JAKO200311921990351https://repository.hanyang.ac.kr/handle/20.500.11754/155941
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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