Ear deformations in the biosonar system of horseshoe bats.
Ear deformations in the biosonar system of horseshoe bats.
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DOI：
10.1121/1.3384441
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发表时间：
2010-03
影响因子：
2.4
通讯作者：
Li Gao;Weikai He;Sreenath Balakrishnan;R. Müller
中科院分区：
文献类型：
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作者：
Li Gao;Weikai He;Sreenath Balakrishnan;R. Müller
许多蝙蝠物种表现出明显的耳朵运动作为其生物声纳行为的一部分。由此产生的平移变换可以包含刚性旋转以及非刚性变形。特征性的耳朵变形经常观察到马蹄蝙蝠（菊头蝠科）。在这些动物中，耳廓在直立和弯曲配置之间定期变化。在弯曲形态中，耳廓的尖端向前、向下和向侧面倾斜，改变耳表面大部分的曲率。整个变形周期只需200 ms即可完成。大菊头蝠（Rhinolophus ferrumequinum）耳廓变形的时变几何形状是用一对立体高速摄像机捕捉到的。在耳廓上用染料标记标志点，这些染料在视频帧中与X射线micro-CT中同样可见。将CT模型与从立体重投影推断的变形耳中的标志的位置相匹配。数值预测是O…
Many bat species exhibit conspicuous ear movements as part of their biosonar behaviors. The resulting transformations of the pinnae can contain rigid rotations as well as nonrigid deformations. Characteristic ear deformations are frequently observed in horseshoe bats (Rhinolophidae). In these animals, the pinna changes regularly between an upright and a bent configuration. In the bent configuration, the tip of the pinna tilts forward, down, and sideways, changing the curvature of large portions of the ear surface. Entire deformation cycles can be completed in as little as 200 ms. The time‐variant geometry of the pinna deformations in the greater horseshoe bat (Rhinolophus ferrumequinum) was captured with a stereo pair of high‐speed video cameras. Landmark points were marked on the pinna with dyes that were equally visible in the video frames as in x‐ray micro‐CT. The CT model was matched to the locations of the landmarks in the deforming ears inferred from stereo reprojection. Numerical predictions were o...