Ultrasonic sounds... harmful?

[Andrew]

lol yea my friend has some of those subs and that shit tickles

anyways though buddy this article in wikipedia is what kind of keeps me on the border of ultrasonics being harmful... Could you please scroll down on that page to safety which is a small ass part and explain it cause I think it proves your point but idk ... lol

http://en.wikipedia.org/wiki/Ultrasound

Their recommendation on decibals of damaging hearing scares me. I think this link is a better reference: http://www.howstuffworks.com/question124.htm

The problem comes when people play them too loud since it's so high pitch it's hard to notice. As far as the guide on that link, I do not know if or how much the amount of dB's that cause hearing loss changes. My assumption is yes that less dB's would damage hearing at higher frequencies but I don't know for sure. Better to adjust on the safe side, I've been listening to ultrasonics for 5 years and can still hear them just as well as on day 1. I even had the volume louder than I shoulder have (but not too loud) for around half a year.