one other little aside about "usually loud" noises: I've often seen people make the claim here that we "didn't evolve" to deal with the kind of really loud noises we're exposed to in cities. I quite agree, and I do think that much of what we consider "age related hearing loss" in the industrialized West, is actually cumulative noise-induced hearing loss from a life spent around cars and guns and construction sites.
That said -- you know what else is incredibly loud? Little kids. We've only got one, and she can belt out sustained bursts of well over 100db when she's mad about something. So, if you think of a "traditional" proto-human living in a cave or other enclosed dwelling, probably surrounded by an entire extended family and a whole ton of little babies who might all be unhappy and screaming at the same time... basically implies that for all of human history we've been exposed to this "unreasonable" noise. So, tinnitus in humans probably goes back at least that far. Of course, by the time you have a bunch of rugrats crawling around your cave, you have fulfilled your evolutionary purpose. I'd say tinnitus is pretty natural, and also clearly doesn't actually affect the ability & desire to procreate very much... since we know that it's got a strong genetic component, it would have been eradicated from the gene pool if it were otherwise.
And, yes, I realize it's an exponential scale and therefore a single Guns & Roses concert at 122db is worse than spending a year in a cave with 110db of screaming primordial human baby.