Chapter 30 — Sonar Sensing

Biological bat-ear deformation in sonar detection

Fast deformations of the outer ear (pinnae) in a female Pratt's roundleaf bat (Hipposideros pratti). The deformations are shown at a speed 67 times slower than real time and occur synchronously with the emission of the biosonar pulses and the reception of the echoes. These changes in the pinnae give the biosonar of roundleaf bats a dynamic dimension that is not found in technical sonar.
Rolf Mueller
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Video recording by Xiaoyan Yin, Shandong University-Virginia Tech International Laboratory, Jinan 250100, China.