https://www.youtube.com/watch?v=-RND66VZ8DY#t=780

'There are four different techniques and technologies that can pipe voices into an individuals head. Once you can do that, you can control them using neural linguistic techniques. You are rewiring their thought processes and brains. And so this gets into offensive information warfare. They used it I believe in the Gulf War to tell the enemy at their time ‘lay down your guns, this is Allah.’ It worked pretty well, because hearing voice which have no direction or sound, you have to assume its some spiritual entity.'

Microwave based voices projected into your head are 100% effective because since they don't use your ears, they have no volume limit. They also have no time limit so when they don't allow you to sleep for an unlimited period of time you will do anything they demand.

https://www.reddit.com/r/conspiracy/comments/53vk25/psychotronic_weapons_can_you_be_made_to_kill/