I've been told that it has to do with whether the hearing loss is sudden or gradual enough that the brain has time to adapt. I think it also depends on whether there is cochlear damage or damage directly to the nerve.Yeah, I still don't understand how someone can have hearing loss, even severe hearing loss, but no tinnitus. That is, why some people and not others?
But really I have no idea, and I really wish I did not have tinnitus and hyperacusis on top of hearing loss.