논문 상세보기
수산해양기술연구
(Journal of the Korean Society of Fisheries and Ocean Technology)
41권 3호 (2005.08)
pp.207-212
pp.207-212
한국수산해양기술학회(구 한국어업기술학회)
(The Korean Society of Fisheriers and Ocean Technology)
초록
Dual frequency acoustic pinger(AP) was manufactured to reduce study effect by long-term use of developed single frequency AP to prevent cetacean bycatch. Directivity characteristic of transducer was the omnidirectional pattern which showed less than ±3dB the change range of sensitivity on the beam pattern of right and left. Source power level(SPL) was 1384311pa with epoxy window before casing however after casing 1170B11Pa at sea. Dual frequency Af was tested to identify the avoidance behavior of bottlenose dolphin by its working. However the efficiency of dual frequency AP about the study effect was verified experiment repeatedly using single and dual frequency AP.
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