Bats navigate in darkness by emitting high sounds and listening for the returning echoes.

The longer version

Echolocation starts with short bursts of very high-frequency vibration, then reads whatever comes back. Short wavelength gives fine detail, so tiny prey reflect enough energy to be detected, and the delay between call and echo gives distance while shifts in pitch reveal motion. High rates also fade fast, which keeps the useful range short and the picture sharp, and direction comes from comparing the two ears.

Calling in bursts avoids deafening the listener with its own voice, and some species adjust the rate as they close in. The method evolved independently in a few other mammals and birds that hunt in darkness, and it inspired later ranging technology.

Where this entry sits

Sound and Music gathers facts about how vibrations move through air and water, how ears turn them into meaning, and how instruments and notation shape what listeners hear. Expect echoes, pitch, volume, acoustics, and the odd silence in between. The full list sits on the Sound and Music page, where every entry is listed in order.