According to Professor Jasterboff . Starting on Page 27 (onwards) of the Tinnitus Retraining Therapy book. The tinnitus signal is generated in the cochlear and it sends the signal along the Auditory nerve and up to the brain - this is when the tinnitus was caused by "loud noise exposure" which is what I mostly deal with when writing about tinnitus.
@Tom Cnyc In my first post, I didn't actually mean the tinnitus signal is generated in the cochlear. I meant, when tinnitus is caused by "loud noise" the "ear hairs" surrounding the cochlear become damaged, so it sends incorrect electrical signals up to the brain and it's here the tinnitus is generated. I have the TRT book with me but haven't got time to go through it in depth at this moment. I will however return to this topic. I always thought the tinnitus was generated in the Limbic system, so If you are right and I am wrong, then I thank you for informing me.
Michael