Understanding the LRAD, the “Sound Cannon” Police Are Using at Protests, and How to Protect Yourself From It
Just as activists have raised their voices demanding justice for George Floyd and the many killed by police violence, the police have met them with their own sound: the LRAD. These audio devices, colloquially known as “sound cannons,” can be used either as conventional public address speaker systems or to generate extremely loud high-frequency sounds specifically intended for the dispersal of crowds, which can also cause pain, disorientation, and injury to those exposed to them.