Skepticism is likely warranted, but it reads as if you are suggesting nerves are not related to neurological disease. That’s extra confusing since a neurological disorder affects the nervous system of which nerves are a part.
Tinnitus can also be caused by incredibly tight/weak neck muscles such as the scalenes/SCM
Tinnitus can also be caused by high blood pressure - literally from hearing the blood.
Tinnitus can also be caused by compression of blood vessels - such as the subclavian artery (subclavian bruit) - often due to induced turbulent flow through the area.
Tinnitus can also be caused by something such as a cerebrospinal fluid leak.
Educate yourself.
Many people cured of CSF leaks or something like Thoracic Outlet Syndrome in which a scalene muscle is cut report decades of tinnitus being somewhat or completely relieved after surgery.
Tinnitus is caused by many, many things - some of which are cured from random things that people don't realize is going to have effect.
However, if you do have one of few neurological disease causes/damaged hairs, that shit definitely sucks and I don't think there's much hope yet aside from earbuds playing a matched frequency. I've actually heard of a good amount of success for some with supposed damaged hairs in that line of treatment - have you ever attempted to try it?
Not my intent to sound like a dick. I've had pretty severe tinnitus for now half of my life and I'm quite young. Shit sucks.
Tinnitus is a symptom and has several different causes. Mostly it's nerve damage and currently there's no way to fix that, but for other people it's something else, and there can be fixes.
And even when it's a symptom of nerve damage there are things that can help. My tinnitus got a lot better when I started using a hearing aid.
Read the book "Hearing Equals Behaviour: Updated and Expand" found on Amazon - maybe it'll give you something to look into, a treatment that may help you dramatically.
This is a neurological disease, no amount of nerve stimulation will ever help. I am a sufferer.
The older comments here are quite suspicious.