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在分布式声学传感数据中增强鱼的发声
Quentin Goestchel1, William S D Wilcock1, Shima Abadi1
1School of Oceanography, University of Washington, Seattle, Washington 98195, USA.
The Journal of the Acoustical Society of America
|May 13, 2025
概括
分布式声学传感 (DAS) 通过光纤电缆有效检测鱼的呼叫. 结合匹配的过和外减去方法可提高用于海洋哺乳动物监测的低信号噪声比检测.
科学领域:
- 海洋生物声学 海洋生物声学
- 海洋学技术 海洋学技术
- 信号处理 信号处理
背景情况:
- 声学监测对于海洋哺乳动物的研究和保护至关重要,它补充了视觉调查.
- 鱼20 Hz的发声非常适合用于声学检测.
- 分布式声学传感 (DAS) 使用光纤电缆在长距离上提供连续的高分辨率声学数据.
研究的目的:
- 评估信号处理技术,以增强和消除DAS数据中的鱼声调.
- 评估DAS对海洋哺乳动物声学监测的有效性.
主要方法:
- 在2021年11月使用海洋天文台倡议区域电缆阵列收集的DAS数据.
- 应用并比较信号与噪声比率估计,匹配过,加博尔过和噪声封面减去.
- 专注于一个65-95公里段,频道间距为2米.
主要成果:
- 匹配过和外包减去的组合被证明对鱼呼叫检测最有效.
- 这种方法成功地检测到了低信号噪声比 (SNR) 鱼的呼叫,并确定了它们的到达时间.
- DAS阵列处理显著改善了SNR和检测能力.
结论:
- DAS是海洋哺乳动物声学监测的一个有前途的技术,特别是对于鱼.
- 先进的信号处理技术提高了用于生物声学应用的DAS数据质量.
- 这项研究表明了DAS在改善海洋哺乳动物检测和保护工作方面的潜力.
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