Experiment on Effect of Screening Hydrophone for Reduction of Flow-Induced Ambient Noise in Ocean
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概要
- 論文の詳細を見る
Experimental results, measured in a shallow sea with tidal current for reducing the flow-induced low-frequency ambient noise, are represented. The hydrophone screened with 3-cm-thick 10 ppi open-cell foam showed the reduction of flow-induced ambient noise up to 24 dB below 50 Hz at the current speed of 56 cm/s. The attenuation of acoustic energy caused by the screen, estimated based on the measurements of ship noise <i>in situ</i> and hydrophone sensitivity in a water tank, is considered to be less than 1 dB at 2--10 kHz band when the thickness of the foam is less than 3 cm.
- 2011-07-25
著者
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Lee Phil-Ho
Agency for Defense Development
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Yoon Jong
Department of Biochemistry and Molecular Biology, College of Pharmacy, Sungkyunkwan University
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Lee Yong-kuk
Korea Ocean Res. And Dev. Inst.
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Lee Seongwook
Korea Ocean Res. And Dev. Inst.
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Kim Seong-ryul
Korea Ocean Res. And Dev. Inst.
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Lee Seongwook
Korea Ocean Research and Development Institute, Ansan, Gyeonggi 426-744, Korea
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Lee Phil-Ho
Agency for Defense Development, P. O. Box 18, Jinhae, Gyeongnam 645-600, Korea
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