Illustration from Scientific Research

The flight chamber with the microphone array system measures the 3D direction and beamwidth of pulses emitted by bats during moth-capture flight. The microphone array consists of 31-channel microphones. Seventeen microphones are arranged in a U-shape on the X-Y plane 1.2 m from the floor (blue frame). Seven microphones are vertically placed on the Z-X plane (red frame) and combined with 12-channel microphones in an O-shape on the Y-Z plane at a 2-m distance from the front wall (green frame). The microphones are spaced at 0.5-m intervals on the x axis, 0.8-m intervals on the y axis, and 0.45-m intervals on the z axis.

DOI