DSpace university logo mark
Japanese | English 

NAOSITE : Nagasaki University's Academic Output SITE > 080 水産学部 > 080 紀要 > 長崎大学水産学部研究報告 > 第98号 >


ファイル 記述 サイズフォーマット
suisan98_11.pdf2.22 MBAdobe PDF本文ファイル

タイトル: 長崎丸が発する水中騒音の特性:速力と距離が音圧および周波数に及ぼす影響
その他のタイトル: Effects of Ship Speed and Propagation Distance on Pressure and Frequency of Underwater Noise Emitted from the Nagasaki Maru
著者: 楠本, 成美 / 八木, 光晴 / 木下, 宰 / 山脇, 信博 / 森井, 康宏 / 清水, 健一
著者(別表記) : Kusumoto, Narumi / Yagi, Mitsuharu / Kinoshita, Tsukasa / Yamawaki, Nobuhiro / Morii, Yasuhiro / Shimizu, Kenichi
発行日: 2017年 3月
出版者: 長崎大学水産学部 / The Faculty of Fisheries, Nagasaki University
引用: 長崎大学水産学部研究報告, 98, pp.11-15; 2017
抄録: Reduction of underwater noise emitted from ships is considered important for preserving and protecting marine mammals and for increasing the precision of ultrasonic instruments. However quantitative reports on underwater noise emitted by ships are scarce. In the present study, the characteristics of underwater noise emitted from the Nagasaki Maru were surveyed. The effects of ship speed and propagation distance on the pressure and frequency of the detected noise were assessed. Ship noise was recorded by a small stationary vessel equipped with digital hydrophone. The Nagasaki Maru sailed at 3 kt, 7 kt and 10 kt in a circle, at a constant distance from the recording vessel. The measured sound pressure level generated by the Nagasaki Maru was slightly higher than the desirable level, but similar to that of other newly built research ships. Sound pressure increased logarithmically with decreasing distance from the ship. Peak sound pressure was detected at approximately 300 Hz at 3 kt, 7 kt and 10 kt; however, the 500–600 Hz band also showed stronger sound pressure at 7 kt and 10 kt.
キーワード: 音響解析 / 周波数解析 / 音圧 / Noise Analysis / FFT / Noise Pressure
URI: http://hdl.handle.net/10069/37104
ISSN: 05471427
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher

引用URI : http://hdl.handle.net/10069/37104



Valid XHTML 1.0! Copyright © 2006-2015 長崎大学附属図書館 - お問い合わせ Powerd by DSpace