Calibration and comparison of the acoustic location methods used during the spring migration of the bowhead whale, Balaena mysticetus, off Pt. Barrow, Alaska, 1984-1993
Calibration and comparison of the acoustic location methods used during the spring migration of the bowhead whale, Balaena mysticetus, off Pt. Barrow, Alaska, 1984-1993
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DOI：
10.1121/1.429421
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发表时间：
2000-06-01
影响因子：
2.4
通讯作者：
Ellison, WT
中科院分区：
文献类型：
--
作者：
Clark, CW;Ellison, WT
在1984年和1993年之间，视觉和声学方法相结合，普查白令楚科奇-博福特弓头鲸，Balaena mysticetus，人口。被动声定位是根据沿沿着冰缘分布在1.5-4.5公里距离上的三至五个水听器的稀疏阵列探测到的瞬变弓头声的到达时间差。到达时间差是根据谱图的数字互相关（旧方法）或时间波形的数字互相关（新方法）计算的。声学校准于1985年在五个现场进行，现场视觉位置由三角测量确定，使用两个经纬仪。视觉和听觉位置之间的差异是
Between 1984 and 1993, visual and acoustic methods were combined to census the Bering-Chukchi-Beaufort bowhead whale, Balaena mysticetus, population. Passive acoustic location was based on arrival-time differences of transient bowhead sounds detected on sparse arrays of three to five hydrophones distributed over distances of 1.5-4.5 km along the ice edge. Arrival-time differences were calculated from either digital cross correlation of spectrograms (old method), or digital cross correlation of time waveforms (new method). Acoustic calibration was conducted in situ in 1985 at five sites with visual site position determined by triangulation using two theodolites. The discrepancy between visual and acoustic locations was