There's apparently a military application for what I thought was an advertising technology:

It appears that some of the troops in Iraq are using "spoken" (as opposed to "screeching") LRAD to mess with enemy fighters. Islamic terrorists tend to be superstitious and, of course, very religious. LRAD can put the "word of God" into their heads. If God, in the form of a voice that only you can hear, tells you to surrender, or run away, what are you gonna do?

What's cool about this weapon is that it's one that will be particularly effective with this enemy. If it happened to me, the voice of God isn't the first theory that I would come up with, since I'm an unbeliever, but with these guys, it probably would be.