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• n  determining the location of something by measuring the time it takes for an echo to return from it

• Bats hunt night-flying moths by echolocation, uttering rapid chirps of ultra sonic sound and flying toward echoes that bounce back from their prey.
• In this treacherous terrain, the whales' critical echolocation system--those telltale clicks whales depend on for everything from avoiding predators to finding a mate--can easily .
• But most bats rely on echolocation, emitting pulses of ultrahigh-frequency sound some 10 times a second, then decoding the sound waves that bounce back from objects.

• echo sounding

News & Articles

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• We Can Now Map Rooms Down to the Millimeter with a Finger Snap
  Bats do it, dolphins do it — even short-tailed shrews do it: I’m talking about echolocation, of course, or the use of sound to find and identify objects in your vicinity. When submarines do it, we call it sonar. And when Morgan Freeman’s character Lucius Fox does something like it in The Dark Knight, we call it pretty darned cool. Now imagine using a technique like that to map a room at high ...
  June 19, 2013 - Techland
• 'Seeing' with sound: There's an app for that
  A team of researchers have developed an algorithm that can map a room based on acoustic echoes, essentially using echolocation like a bat. 
  June 18, 2013 - The Christian Science Monitor
• Echolocation For Your Cell Phone
  sciencehabit writes "In a few years, an iPhone app may give you a 3D layout of a room as soon as you step into it. Researchers have developed an algorithm that spits out the shape and contours of complex structures (including Switzerland's Lausanne Cathedral) using data compiled from four randomly placed microphones. The technology, which relies on the same sort of echolocation bats and dolphins ...
  June 17, 2013 - Slashdot