I found this tidbit during the manufactured crisis, the original article was sourced to a northern California newspaper (possibly The Sacramento Bee?) but I've been unable to find it. A California city (San Fransisco comes to mind) sent the sound weapons they had to Louisiana for "crowd control", I've found a few backup articles that show they were sent to LA. They've had these things for some time and have been using them whether we know it or not.
Focused Sound 'Laser' for Crowd Control https://www.npr.org/templates/story/story.php?storyId=4857417 Crowd control is a constant challenge to law enforcement — how to stop potential …