Noseleaf pit in Egyptian slit-faced bat as a doubly curved reflector

Noseleaf pit in Egyptian slit-faced bat as a doubly curved reflector
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埃及狭缝蝙蝠的鼻叶坑作为双曲面反射器

DOI:
10.1209/0295-5075/97/44001
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发表时间:
2012-02
期刊:
Europhys. Lett.
影响因子:
--
通讯作者:
Fuxun Wang
Fuxun Wang
中科院分区:
其他
文献类型:
--
作者:
Qiao Zhuang;Xiaomin Wang;Mingxuan Li;Jie Mao;Fuxun Wang

文献摘要

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人们假设裂面蝙蝠的鼻叶会影响声纳波束。使用数值方法,我们表明,坑在埃及缝面蝙蝠的鼻叶有一个效果,聚焦声学近场以及塑造的辐射模式,从而提高方向性。这种效应的性质所暗示的潜在物理机制是,凹坑充当了双弯曲反射器。由于坑,波束形状是整体定向的,并且在生物声纳频率范围的高端更有选择地加宽,以改善目标的空间覆盖和可探测性。
Noseleaves in slit-faced bats have been hypothesized to affect the sonar beam. Using numerical methods, we show that the pit in the noseleaf of an Egyptian slit-faced bat has an effect on focusing the acoustic near field as well as shaping the radiation patterns and hence enhancing the directionality. The underlying physical mechanism suggested by the properties of the effect is that the pit acts as a doubly curved reflector. Thanks to the pit the beam shape is overall directional and more selectively widened at the high end of the biosonar frequency range to improve spatial coverage and detectability of targets.
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发表时间: 2000-07
期刊: --
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发表时间: 2007-12
影响因子: 3.4
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通讯作者: R. Müller;R. Kuc
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