Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, 610-0321, Japan.
Faculty of Science and Engineering, Doshisha University, Kyotanabe, 610-0321, Japan.
J Acoust Soc Am. 2022 Jun;151(6):4039. doi: 10.1121/10.0011737.
The practicality of the finite-difference time-domain (FDTD) method was confirmed by comparing head-related transfer functions obtained from a three-dimensional (3D) digital model of a bat (Rhinolophus ferrumequinum nippon) head with acoustic experiments using a 3D printed physical model. Furthermore, we simulated the auditory directionality using a 3D digital model that was modified based on the pinna movement of a bat during echolocation and found that the alternating movements of the left and right pinna result in a binaural sound pressure difference for vertical sources. Using the FDTD method, suitable for simulating acoustics in large spaces, we could analyze in detail the binaural echoes that bats receive and the acoustic cues they use for echolocation.
通过将从蝙蝠（Rhinolophus ferrumequinum nippon）头部的三维（3D）数字模型获得的头相关传递函数与使用 3D 打印物理模型进行的声学实验进行比较，证实了有限差分时域（FDTD）方法的实用性。此外，我们使用基于蝙蝠在回声定位过程中耳郭运动的修改后的 3D 数字模型模拟了听觉方向性，并发现左右耳郭的交替运动导致了垂直声源的双耳声压差。使用 FDTD 方法，非常适合模拟大空间中的声学，我们可以详细分析蝙蝠接收的双耳回波以及它们用于回声定位的声学线索。
