LRAD sound weapons at protests use focused acoustic beams up to 162 decibels that cause permanent hearing damage, but distance and industrial earplugs provide effective protection.

On a suburban street in Maple Grove, a device first built for battlefields and warships was pointed at a crowd of Minnesota protesters. The long-range acoustic system, sometimes described by critics ...

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 ...