martin82,

From what I have read, they can not directly connect tinnitus to hair cells, at least not for everyone. There are many of us whose tinnitus comes and goes without any understandable cause. Mine will spike after a glass of water or eating something. It can become pulsatile tinnitus for no reason.

I found I can find the pitch of my tinnitus with a piano keyboard. Mine is at about 1108 hz or C#6 or slightly higher.

I think a better subject title could have been, "Tinnitus Almost Everyone" LOL
It is a very common complaint.