School of Information Science and Engineering, Shandong University, Qingdao, Shandong 266237, China.
Shenzhen Research Institute, Shandong University, Shenzhen, Guangdong 518057, China.
Phys Rev E. 2020 Oct;102(4-1):040401. doi: 10.1103/PhysRevE.102.040401.
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.
回声定位蝙蝠通过声纳定位目标。该系统的性能与蝙蝠的双耳形态有关。通过数值预测，发现在中心频率带中，强旁瓣的方向在垂直方向上几乎呈线性移动。受此启发，作者通过构建一对直立的人工耳羽来构建一个精确的宽视场仰角估计系统，并通过构建一对正交的耳羽来实现仰角和方位角的同时估计。通过演示空间目标回声定位的简单性，作者表明，无论是仰角还是方位角估计，只需要两个独立的单输出神经网络。该方法可应用于模仿任何其他具有类似耳羽指向性模式的哺乳动物，以促进和改进人工回声定位系统。
