Mono-hydrophone localization of baleen whales: a study of propagation using a spectral element method applied in Northern Chile

J. Patris, D. Komatitsch, M. Sepúlveda, Macarena Santos, H. Glotin, Franck Malige, Susannah J. Buchan, M. Asch
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引用次数: 1

Abstract

In the context of passive acoustic monitoring of large whales, we propose a new method for localizing blue whales (Balaenoptera musculus) from the acoustic recordings of only one sensor. We use a precise modelling of the sound propagation thanks to SPECFEM, a spectral element code for solving wave propagation equations. Based on field measurements in Northern Chile, we ran a simulation on a large supercomputer. We also exploited a recording device, Bombyx II, for one and a half months, with visual monitoring of the zone by a group of experts. We find that the method applied to the south east Pacific song of blue whales gives theoretical results of about 50% success in position recovery. Since we have redundancy in our data, we were able to locate the whale with a precision of 500 m over a box of 10 km by 5 km in the case when we have both visual detection and a strong acoustic signal. More tests should be performed before validating this method, but these first results are encouraging.
须鲸的单水听器定位:在智利北部应用的光谱元素方法的传播研究
在大型鲸鱼被动声学监测的背景下,我们提出了一种仅从一个传感器的声学记录中定位蓝鲸(Balaenoptera musculus)的新方法。我们使用SPECFEM(一个用于求解波传播方程的谱元代码)对声音传播进行精确建模。根据在智利北部的实地测量,我们在一台大型超级计算机上进行了模拟。我们还使用了一个记录设备,Bombyx II,用了一个半月的时间,由一组专家对该区域进行了视觉监控。我们发现,应用于东南太平洋蓝鲸之歌的方法在位置恢复方面的理论结果成功率约为50%。由于我们的数据有冗余,在我们同时拥有视觉检测和强大的声学信号的情况下,我们能够在10公里乘5公里的范围内以500米的精度定位鲸鱼。在验证此方法之前,还需要进行更多的测试,但这些初步结果令人鼓舞。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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