ech·o·lo·ca·tion (ěk'ō-lō-kā'shən) n.
In both senses also called echo ranging.
A sensory system in certain animals, such as bats and dolphins, in which usually high-pitched sounds are emitted and their echoes interpreted to determine the direction and distance of objects.
Electronics A process for determining the location of objects by emitting sound waves and analyzing the waves reflected back to the sender by the object.
(ěk'ō-lō-kā'shən) 