Austin protesters first noticed APD using the device in the 2020 Black Lives Matter demonstrations. There were worries about LRADs then, and those worries continue, because the devices can emit 160 decibels of sound.
to order the crowds off of I-35. There were worries about LRADs then, and those worries continue, because the devices can emit 160 decibels of sound, which is louder than a jet engine or a gunshot. This sound level can permanently deafen people at close distance, perforate eardrums, and cause disorientation and mild. LRADs also have an"alert" tone that emits an irritating sound, which has been used as a sonic weapon. Some believe the devices can interfere with a person's heartbeat.
of the device. Ellinger told us he believed the LRAD mounted to the police car was 20 meters from the main body of protesters. He said it was never turned on.Literature on LRADs expands on the operating manual's warning."The LRAD sound field is innocuous until you are in the midst of it," wrote a researcher from the acoustic consulting firmin 2020.
“I’ve been there when they’ve used it and I know it’s not used for nefarious activities. … We can’t use it to hurt people’s ears or to do the other things it can do.”stressed that APD needs LRADs for large protests and that officers do not use them improperly."We use it because our handheld microphones and our in-car microphones are not able to communicate with the big crowds we've been having for the abortion protests and for the protests back in 2020," he said.
"The LRAD is designed for one specific purpose and one purpose only, according to their own manuals, and that purpose is long-distance ship-to-ship communications," Davis said."Now I understand they are mounting them on the front of vehicles, which makes them a hundred percent more dangerous. It's one thing to put it over people's heads and subject them to harmful sounds that way.
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