echolocation

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ech·o·lo·ca·tion

(ek'ō-lō-kā'shŭn),
Term applied to the method by which bats direct their flight and avoid solid objects. The creatures emit high-pitched cries that, though inaudible to human ears, are heard by the bats themselves as reflected sounds (echoes) from objects in their path.

echolocation

the means by which objects are identified through echoes returned from very high frequency sound emissions. Bats use such a system to avoid objects in flight and to locate prey, as do toothed whales and dolphins.
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"Bats have to be able to do three things to survive - fly, echolocate, and use their echo-location to catch insects.
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In a scene in The Dark Knight, Batman even used a sonar technology to perceive his surroundings in much the same way as Daredevil uses his 'human echo-location' ability (developed from enhanced hearing when he was blinded in an accident).
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Noise pollution also caused the animals, which navigate by sonar echo-location, to collide with shipping and get caught in propellers.
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Another common misconception - that these bats are blind and use natural echo-location sonar to navigate.
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Another common misconception is that these bats are blind and use natural echo-location sonar to navigate.
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