>and it almost harmonized with my tinitis
>I read that NAC and Ginko Biloba helps with tinnitus.
I made a serendipitous discovery that has helped, but not resolved my own tinitus. Not only do I get ringing or keening, from time to time I get bizarre low vibration noises in my left ear. One day I put some large soft foam earplugs in both ears before using some loud equipment. I left them in while I ate lunch and noticed the noise in my left ear wasn't bothering me as much. The noise was still there, it just didn't bother me as much when I had the plugs in.
So I bought a big bottle of large foam earplugs at the pharmacy, and I still use them.
I think it has something to do with pressure in the ear canal, since smaller plugs don't help.