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LRAD sonic blasters: Protests boost sales — and fears

QUANTICO, Va. — Police deployment of sonic blasters at Occupy Wall Street and G-20 protest rallies is fueling both sales and criticism of the devices, which emit beams of sound with laser-like intensity. More U.S. police and emergency-response agencies are using the so-called Long-Range Acoustic Devices instead of megaphones or conventional loudspeakers for crowd control, […] ....

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