Matsuo Ikuo, Takanashi Takuma
Department of Information Science, Tohoku Gakuin University, 2-1-1 Tenjinzawa, Izumi-ku, Sendai 981-3193, Japan
Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan
J Acoust Soc Am. 2015 Sep;138(3):EL276-9. doi: 10.1121/1.4929734.
Using echolocation influenced by Doppler shift, bats can capture flying insects in real three-dimensional space. On the basis of this principle, a model that estimates object locations using frequency modulated (FM) sound was proposed. However, no investigation was conducted to verify whether the model can localize flying insects from their echoes. This study applied the model to estimate the range and direction of flying insects by extracting temporal changes from the time-frequency pattern and interaural range difference, respectively. The results obtained confirm that a living insect's position can be estimated using this model with echoes measured while emitting intermittent FM sounds.
利用受多普勒频移影响的回声定位，蝙蝠能够在真实的三维空间中捕捉飞行中的昆虫。基于这一原理，提出了一种使用调频（FM）声音估计物体位置的模型。然而，尚未进行研究来验证该模型是否能够根据飞行昆虫的回声对其进行定位。本研究应用该模型，分别通过从时频模式和耳间距离差中提取时间变化，来估计飞行昆虫的距离和方向。获得的结果证实，使用该模型并结合在发出间歇性FM声音时测量到的回声，能够估计出活体昆虫的位置。
