Gadget Review on MSN
LRAD sound weapons at protests: How they work and protection tips
LRAD sound weapons at protests use focused acoustic beams up to 162 decibels that cause permanent hearing damage, but ...
Several police departments across America are planning to try a new device that uses focused sound, turned way up. These so-called non-lethal... Focused Sound 'Laser' for Crowd Control Crowd control ...
When [Electron Impressions] used a powerful ultrasonic array to project a narrow beam of sound toward a target, he described ...
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