The sonar beam pattern of a flying bat as it tracks tethered insects
The sonar beam pattern of a flying bat as it tracks tethered insects
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DOI：
10.1121/1.1589754
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发表时间：
2003-08-01
影响因子：
2.4
通讯作者：
Moss, CF
中科院分区：
文献类型：
--
作者：
Ghose, K;Moss, CF
本文介绍了测量飞行回声定位蝙蝠，Eptesicus fuscus，执行各种昆虫捕捉任务在一个大的实验室飞行室的声纳波束模式。使用麦克风线性阵列上的信号强度推导出波束方向图。蝙蝠和昆虫猎物的位置是通过从两个摄像机视图的立体重建获得的。结果以波束图和波束轴的估计方向的形式报告。蝙蝠将其光束轴以30度的标准偏差（sigma）对准选定的目标。实验误差为+/-1.4度。用两个目标进行的试验表明，蝙蝠始终用它的光束跟踪其中一个目标。这些发现表明，蝙蝠声纳波束的轴是选择性跟踪目标的一个很好的指标，在这方面类似于主要视觉动物的凝视。(C)2003年，美国声学学会。
This paper describes measurements of the sonar beam pattern of flying echolocating bats, Eptesicus fuscus, performing various insect capture tasks in a large laboratory flight room. The beam pattern is deduced using the signal intensity across a linear array of microphones. The positions of the bat and insect prey are obtained by stereoscopic reconstruction from two camera views. Results are reported in the form of beam-pattern plots and estimated direction of the beam axis. The bat centers its beam axis on the selected target with a standard deviation (sigma) of 3degrees. The experimental error, is +/- 1.4degrees. Trials conducted with two targets show that the bat consistently tracks one of the targets with its beam. These findings suggest that the axis of the bat sonar beam is a good index of selective tracking of targets, and in this respect is analogous to gaze in predominantly visual animals. (C) 2003 Acoustical Society of America.