Oh, I have an old, old, old Popular Science or Popular Mechanics or
Science and Mechanics or Mechanix Illustrated (it's one of those old
magazines) article about sonic sound. (I think it's sonic sound, maybe
it's ultrasonic sound.The sound is inaudible, or mostly inaudible) and
can make people fall down and be rolling around on the ground in extreme
pain in their head.
I think www.amazing1.com sells some sort of pain field generators
(or whatever they are called?) for making stray dogs scram.I need
something that is higly dirctional though, I wouldn't want any back
scatter to affect my little doggy.
cuhulin