Message posted by Adam on December 10, 2013 at 18:48:00 PST:

I posted this to another thread too in reference to the siren sound.

The guard trucks may have the new Federal Signal Rumbler siren. It uses low frequency sound waves to vibrate the vehicles in front of it and get them to move over. Here is a link to a demo of it...

http://www.youtube.com/watch?v=FEe7AZQOpN0

In Reply to: Re: weird stuff going on at Area 51 posted by Joerg (Webmaster) on October 21, 2013 at 18:15:24 PST:

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