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Understanding the LRAD, the “Sound Cannon” Police Are Using at Protests, and How to Protect Yourself From It

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pitchfork.com

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.

Genasys, manufacturers of the LRAD, issued a press release touting its use by police departments in seven cities during the protests of the last week, including Portland, Ore., Colorado Springs, San Jose, and Fort Lauderdale.

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