Long duration real-time observation of Irrawaddy dolphins in Chilika lagoon
Long duration real-time observation of Irrawaddy dolphins in Chilika lagoon
复制标题
奇利卡泻湖伊洛瓦底江海豚长时间实时观测
DOI：
10.1109/oceans.2007.4449268
复制
发表时间：
2007
期刊：
影响因子：
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通讯作者：
C. Kar
中科院分区：
文献类型：
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作者：
T. Inoue;T. Ura;H. Sugimatsu;T. Sakamaki;Junichi Kojima;R. Bahl;S. K. Panda;Muntaz Khan;B. K. Behera;S. Behera;H. Takahashi;S. Kar;C. Kar
作者开发了一种被动声学观测系统，用于监测Chilika泻湖的伊洛瓦底江海豚（Orcaella brevirostris）。该系统的目的是监测详细的海豚水下行为使用短基线（SBL）系统所有通过白天和黑夜。水下声音以500 kHz的采样频率记录，分辨率为16位。该系统于2007年1月29日至2月3日和2月18日在Chilika泻湖部署。实验进行了一整夜。通过更换电池和硬盘，使观测系统始终保持运行。因此，作者成功地从伊洛瓦底江海豚获得了连续约21小时的连续时间的点击数据，每次试验和约1TB的声学数据，共获得。这些数据包含许多高频信号，这些信号被认为是虾发出的噼啪声，虾通常出现在温暖的浅水区，如Chilika泻湖。一个去噪计算开发和应用到所获得的数据。在Chilika泻湖的浑浊环境中，可以观察到海豚的清晰轨迹，这是以前从未见过的。在本文中，详细的想法和描述的设置和部署的系统。此外，将讨论去噪计算和观测到的海豚轨迹。
The authors have developed a passive acoustic observation system to monitor Irrawaddy dolphins (Orcaella brevirostris) in Chilika lagoon. The system is designed to monitor the detailed underwater behavior of dolphins using a Short Base Line (SBL) system all through the day and night. The underwater sounds are recorded at a sampling frequency of 500 kHz with 16 bits resolution. This system was deployed in Chilika lagoon from 29th January to 3rd February and on 18th February in 2007. Experiments were carried out all through the night. By replacing the batteries and hard disks, the observation system was made to keep running all the time. Consequently, the authors succeeded in obtaining click data from Irrawaddy dolphins for a continuous duration of about 21-hour consecutively for each trial and about 1TB of acoustic data was obtained in total. The data contained many high frequency signals, which are considered to be the snapping noise made by shrimp, which are typically found in warm shallow water areas such as Chilika lagoon. A de-noise calculation is developed and applied to the obtained data. A clear picture of trajectories of dolphins in the turbid environment of the Chilika lagoon can be observed that has never before been seen. In this paper, detailed ideas and descriptions of the set up and deployment of the system are presented. Furthermore, the de-noise calculation and the observed dolphin trajectories will be discussed.
用于监测日本沿海地区江豚的高分辨率声学设备的结果
DOI：
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发表时间：
2006
期刊：
Proc OCEANS'06 Singapore, Singapore
影响因子：
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作者：
浦環;Rajendar Bahl;矢野正人;井上知己;坂巻隆;福地鉄雄
通讯作者：
福地鉄雄
DOI：
10.1109/oceansap.2006.4393872
发表时间：
2006-05
期刊：
OCEANS 2006 - Asia Pacific
影响因子：
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作者：
R. Bahl;T. Ura;H. Sugimatsu;T. Inoue;T. Sakamaki;Junichi Kojima;Tomonari Akamatsu;H. Takahashi;S. Behera;A. Pattnaik;Muntaz Khan;S. Kar
通讯作者：
R. Bahl;T. Ura;H. Sugimatsu;T. Inoue;T. Sakamaki;Junichi Kojima;Tomonari Akamatsu;H. Takahashi;S. Behera;A. Pattnaik;Muntaz Khan;S. Kar