Since we cannot hear these sounds naturally, researchers use [5, 7]. These devices use specialized microphones to capture high-frequency audio and then either heterodyne it (shifting the pitch) or use time expansion (slowing it down) so humans can study the intricate patterns of their "acoustic maps" [5, 7].
: Most bats emit sounds between 20 kHz and 200 kHz [1]. For context, the upper limit of human hearing is roughly 20 kHz [2]. heres_what_bat_echolocation_sounds_like_slowed_...
: The pulses speed up as the bat detects a target [6]. Since we cannot hear these sounds naturally, researchers