LRAD products use directionality and high acoustic output to clearly transmit critical information, instructions, and warnings well from 100 to 3000 meters. LRAD systems can also transmit powerful deterrent tones to influence behavior in hostile situations. LRAD significantly extends the standoff and perimeter in friendly or escalated environments.
http://www.lradx.com/site/content/view/293/110The LRAD (Long Range Acoustic Device) was used for the first time in the USA in Pittsburgh during the time of G20 summit on September 24-25th, 2009
http://www.youtube.com/watch?v=QSMyY3_dmrM&feature=share"Law and order puppets, remote-controlled by greed." -Devo
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