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Spatial Coherence Analysis of Underwater Ambient Noise Measured at the Yellow Sea
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 Title & Authors
Spatial Coherence Analysis of Underwater Ambient Noise Measured at the Yellow Sea
Kwon, Hyuckjong; Kim, Junghun; Choi, Jee Woong; Kang, Donhyug; Cho, Sungho; Jung, Seom-Kyu; Park, Kyeongju;
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 Abstract
Coherence describing the similarity between physical quantities of two signals is a very useful tool to investigate the temporal and spatial characteristics of signals propagating in underwater acoustic waveguide. Ambient noise measurements were made by the vertical received array consisting of three hydrophones as part of the KIOST-HYU joint acoustics experiment, and the coherence for the underwater ambient noise was analyzed. In this paper, the coherence results in cases that the generator in the research vessel was off and turned on are presented. The coherence estimated in the case of the generator operation mode are compared to the predictions obtained using the theoretical model with the directional density function dominated by vertical components propagating downward from the ship. In the case of the generator switch-off, the results are compared to the model predictions with directional density function including the effects of sea surface noise and long-distance shipping noise.
 Keywords
Spatial coherence;Ambient noise;Bottom type;Vertical line array;
 Language
Korean
 Cited by
1.
천해 지질환경에서의 음파전달 특성 연구를 위한 KIOST-한양대 공동실험 개요,조성호;강돈혁;이철구;정섬규;최지웅;오선택;

한국음향학회지, 2015. vol.34. 6, pp.411-422 crossref(new window)
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Overview of the KIOST-HYU Joint Experiment for Acoustic Propagation in Shallow Water Geological Environment, The Journal of the Acoustical Society of Korea, 2015, 34, 6, 411  crossref(new windwow)
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