a great, but highly metaphysical question
can we hear, or see, or smell or feel, brain cells dying ?
maybe
but i would say that we certainly "hear" the results of the death of stereo cilia (hearing "hairs) and thats tinnitus
when the hearing hair cells are wiped out the potassium ion channel gate in the cell malfunctions.but.....the cell lives on... possibly an unfortunate outcome...i dont know for sure (maybe if the cell itself died we wouldnt hear the phantom sounds? (conjecture)
the idea that you can "hear" the damage taking place is not far fetched... for example, one can feel ones skin getting sun burnt...after a while
best wishes
mock turtle