On September 30, 2019 11:35:43 AM PDT, jim bell wrote:

It's possible this could be fought by building a fairly large corner-cube retroreflector and aiming it at the source of the sound.  While that might not be precise, it would send a lot of sound back to the area around the emitter.                            Jim Bell

https://www.thedailybeast.com/how-the-lrad-went-from-a-pirate-deterrent-to-a...

LRADS can be defeated with earbuds and metal music. Just read the police in Hawaii used one to break up a native protest at a burial ground due for condo development. The organizer clarified that the LRAD was used like a super-loud bullhorn. Not as a weapon. I suspect they're pretty much useless as a crowd control tool if the crowd is prepared. Next up... Subsonic weapons. The band Devo had the right idea when they suggested they were going to do a show with hyped-up subsonics, hand out diapers at the door, and make the concertgoers shit their britches. IMAGINE the demoralizing effect on protesters with their pants full. Rr Sent from my Androgyne dee-vice with K-9 Mail