These sonic weapons can be turned against the aggressor using them very simply - construct a 90 degree corner reflector to bounce the sonic waves straight back at the police state. Watch the line of police officers arrayed in front of the sonic weapon scatter as the sound is deployed against them. I'm sure the manufacturer of said weapon doesn't want you to know about this, or even be schooled well enough to come to this conclusion on your own. Welcome to the police state. Let's take it down together.

[link to en.wikipedia.org]