View single post by ArizonaEvp
 Posted: Apr 19th, 2011 04:56 AM
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Joined: Jun 26th, 2009
Location: Heart Of Arizona Indian Country, Arizona USA
Posts: 662

On one side of the spectrum I thought you might make use of Radar.

As in a radar gun - sports speed gun.  That uses a very narrow beam.

On the other-side of the spectrum....there is the UV LEDs mentioned above.

Laser microphones have been around for a while.  Seen lots of video on youtube about them.


Last edited on Apr 19th, 2011 05:12 AM by ArizonaEvp