I had a ringing for a weekend and found and used this extensively https://github.com/generalfuzz/acrn I remember it being after some loud event. But I honestly can't remember. It went away. But it might not have been tinnitus and just an ear infection. Or it might have helped, I'm just one sample size.
Interesting. It seems my tinnitus is around freq 8200. I'll give this tool a go when I'm in a more quiet environment.
Does it do that to you as well?
The sounds were pretty annoying but at least I could control their intensity and while going to sleep I could gradually make it lower and lower until I slept.