Special acoustical role of pinna simplifying spatial target localization by the brown long-eared batPlecotus auritus,Physical Review E

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Special acoustical role of pinna simplifying spatial target localization by the brown long-eared batPlecotus auritus
Physical Review E ( IF 2.2 ) Pub Date : 2020-10-15 , DOI: 10.1103/physreve.102.040401
Xin Ma _{1,

2} , Sen Zhang ₁ , Zheng Dong ₁ , Hongwang Lu ₃ , Jinke Li ₄ , Weidong Zhou ₅

Affiliation

Echolocating bats locate a target by sonar. The performance of this system is related to the shape of the binaural conformation in bats. From numerical predictions, it was found that in a central frequency band, the orientation of a strong sidelobe is shifted nearly linearly in the vertical direction. Inspired by this, the authors built an accurate wide-scope elevation estimation system by constructing a pair of erect artificial pinnae and realized simultaneous elevation and azimuth estimation by constructing a pair of orthogonal pinnae. By demonstrating the simplicity of spatial target echolocation, the authors showed that only two independent single-output neural networks were needed for either elevation or azimuth estimation. This method could be applied to imitate any other mammal species with similar pinna directivity patterns to facilitate and improve an artificial echolocation system.

中文翻译：

耳廓的特殊声学作用简化了棕色长耳蝙蝠 Plecotus auritus 的空间目标定位

回声定位蝙蝠通过声纳定位目标。该系统的性能与蝙蝠双耳构象的形状有关。从数值预测中发现，在中心频带中，强旁瓣的方向在垂直方向上几乎线性偏移。受此启发，作者通过构建一对直立的人工耳廓构建了精确的广域高程估计系统，并通过构建一对正交的耳廓实现了高程和方位角的同步估计。通过展示空间目标回声定位的简单性，作者表明，仰角或方位角估计只需要两个独立的单输出神经网络。

更新日期：2020-10-15

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