Here’s something to consider. It’s well known that Beethoven lost his hearing entirely and continued to compose music afterwards, but his hearing deteriorated over a period of years, not months.
He apparently discovered how deaf he was becoming when he saw birds being frightened by the sound of the bells of Stefansdom, Vienna and couldn’t hear the bells himself.
I wonder how much his mind had been filling in up to the point of that realization, if that tale is actually true.
It seems to me that the brain is the true organ of hearing and can fill in a huge amount of information before noticeable deterioration in sound quality occurs. Everything between the source and the brain contributes, of course, to the perceived sound. Seems like an interesting subject to me, but also a can of worms, so I’m not going to start a new thread on the subject.