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https://rumble.com/vv5of3-lrad-weapons-caused-serious-burns-and-injuries-to-protesters-in-canberra-au.html?mref=6zof&mc=dgip3&ep=2
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https://en.wikipedia.org/wiki/Long_Range_Acoustic_Device
https://www.audiologist.org/item/crowd-control-with-long-range-acoustic-devices-can-cause-permanent-hearing-loss
https://www.aclu.org/fact-sheet/acoustic-weapons-fact-sheet
already exist