home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Epic Interactive Encyclopedia 1998
/
Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
/
E
/
Echolocation
/
INFOTEXT
< prev
Wrap
Text File
|
1992-09-02
|
981b
|
24 lines
Method used by certain animals, notably bats
and dolphins, to detect the positions of
objects by using sound. The animal emits a
stream of high-pitched sounds, generally at
ultrasonic frequencies (beyond the range of
human hearing), and listens for the returning
echoes reflected off objects to determine
their exact location. As with radar, the
distance of an object can be established by
the time difference between the emitted sound
and its return as an echo. Echolocation is of
particular value under conditions when normal
vision is poor (at night in the case of bats,
in murky water for dolphins). A few species
of bird can also echolocate. The location of
an object can be established by the time
difference between the emitted sound and its
differential return as an echo to the two
ears. Echolocation is of particular value
under conditions when normal vision is poor
(at night in the case of bats, in murky water
for dolphins). A few species of bird can also
echolocate.