Development of new calibration method for low frequency underwater sounds

2019 Fiscal Year Final Research Report

• Project/Area Number: 16K14518
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Naval and maritime engineering
• Research Institution: The Sasakawa Peace Foundation (2019); Fisheries Research and Education Agency (2016-2018)
• Principal Investigator: AKAMATSU TOMONARI 公益財団法人笹川平和財団, 海洋政策研究所 海洋政策研究部, 上席研究員 (00344333)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Keywords: 水中音響 / 騒音影響評価 / 感度校正 / 鯨類 / イルカ / 環境アセスメント / 洋上風力 / 再生可能エネルギー

Outline of Final Research Achievements

A new calibration method for underwater low frequency sound was proposed that has not been possible without large floating pen and funding before. This calibration method conducted in calm lake provided accurate sensitivity value within 1 dB comparing with that measured at underwater calibration facility. We compared non-calibrated hydrophones produced in US, New Zealand, and Japan, and found sound receiving characteristics for each.

Free Research Field

水中生物音響

Academic Significance and Societal Importance of the Research Achievements

この技術は、洋上風力発電をはじめとする再生可能エネルギー開発と漁業との共存や、国際海事機関で議論が進む船舶騒音規制における科学的なデータ取得に貢献すると考えられる。また、海底鉱物資源探査で今後の活用が見込まれる狭帯域低周波音源の校正が容易になる。低周波で影響を受けると考えられる魚類や大型ヒゲクジラへの音暴露評価に、開発技術が役立てられはじめた。