I've noticed this problem with many wikis, and it might have something to do with Mac computers, as it only happens to me at work where I use one. At home, even with head phones, I don't get this issue.
I'm not bullshitting though, I have my system volume at 40%. YouTube videos play at a normal volume, everything else does as well. But for some reason, opening any sound file on this wiki and many other wikis has resulted in me blowing out my eardrums.
My initial post was a bit emotion-driven, as it was insanely frustrating to have my tinnitus get even worse, and I know this isn't an individual's fault and I didn't mean to suggest that.