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[microsound] Visualizing audio tape "tampering"



http://www.eurekalert.org/pub_releases/2004-10/nios-ns102604.php

First para:

"The Department of Commerce's National Institute of Standards and
Technology (NIST) has developed a real-time magnetic imaging system that
enables criminal investigators to "see" signs of tampering in
audiotapes---erasing, overdubbing and other alterations---while listening
to the tapes."

Graphic shows how imaging "reveals where a write head (taping event)
stopped as a series of smudges or streaks on a film strip."

  ghede@xxxxxxxx
  http://www.quietamerican.org

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