I am serious. I bought the Ultrasones for their sound sig which I like and I am not really interested in hearing damage since I don't play my music very loud, but the Ultrasones have been tested by an audiological laboratory of the Radboud University in Nijmegen, the Netherlands. And no, this is not a 'prestigious non-accredited university'
, but a real, well-established, research-oriented university. The outcome of the research apparently supported Ultrasone's claim that their phones are safer. I can't vouch for the audiological laboratory's research methods, nor for the outcome, and I don't know whether Ultrasone sponsored the research. I am simply relaying what I have read/seen. The research has been featured on Dutch regional TV. Apparently, the research was undertaken because of hearing loss concerns for audio professionals and Ultrasone actively markets its professional phones as being safer than other professional phones. Whether that's true, you have to ask somebody who knows what he/she is talking about.
This is the link for those of you who understand Dutch. Scroll down in the 'nieuws' menu until you see the TV item and the info.
Crusade-Audio // Sound Quality
As far as I understood, Ultrasones seem to create a higher sound volume, without actually upping the volume. Don't ask me to explain it any better, because I can't. I am sure somebody around here can. And from my judicious use of 'apparently' in my posts in this thread, you may surmise that the only thing I am sure about is that these claims have been made and that they have been backed up by what looks like independent scientific inquiry. Which is altogether a different thing from those claims actually being true...
Back to the main point for me: I like the Ultrasone sound sig and whether they are less likely to damage my hearing or not, they don't easily fatigue my ears.