[microsound] Visualizing audio tape "tampering"

[".turnstyle" <nil@xxxxxxxxxxxxx>]

> 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."


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