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You'll need headphones for this to work. Make sure there is no noise around, close your eyes, turn the volume up a little bit, hold and press headphone on your ears for better hearing, play it and enjoy this impressive audio work ( illusion ). Not a screamer not a prank!

CREDITS: Finally the origin of the embedded audio clip has been found. This amazing audio clip was created by QSound Labs ( http://www.qsound.com ) as a demonstration of Binaural audio technology.

See this wikipedia entry for information about binaural recordings.

http://en.wikipedia.org/wiki/Binaural_recording

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