I saw something on the science channel the other day that looked kinda like a megaphone. When aimed at an individual who was talking it would play back their speach with a slight delay. It confused the brain and they pretty much weren’t able to talk. At first their words turned to jiberish and then just quit talking. Can’t really think of a good tactical use for it but the science is interesting. Maybe you could aim it at a group of attackers and mess up their communication.