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Echolocation
See:
Animal echolocation
: animals emitting
sound
waves and listening to the echo in order to locate objects or navigate.
Human echolocation
: the use by the
blind
of sound to navigate.
Sonar
: (
so
und
n
avigation
a
nd
r
anging) the use of sound to
navigate
or to locate other watercraft, usually by
submarines
.
Echo sounding
: listening to the echo of sound pulses to measure the distance to the bottom of the sea, a special case of Sonar.
Medical ultrasonography
: the use of
ultrasound
echos to look inside the body
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