using high pitch frequency to irritate certain groups

So I hear the military has been testing this, and malls have been using it as a deterrent, but it's kind of interesting to see if you can hear the pitch they're using. this literally hurt my left ear. its not like any mosquito i've ever heard (what the website said it's supposed to sound like), it's more like that sound that older tv's make (that shit is irritating too) in fact, it was so irritating that it didn't make me want to leave or anything, it just instantly pissed me off, therefore i don't think this would be a good weapon, since it incites this type of behavior.

Created by Train Horn