I can't help with tinnitus itself, but I highly recommend "Eargasm High-fidelity Ear plugs", or similar devices, to help prevent further damage.

They work really well to dampen loud sounds and, importantly, they let conversation through, though it sounds muffled. But you can feel the difference. They are much better than using foam ear plugs, which muffle everything.

I used to go to a lot of concerts without any ear protection, when I was young and dumb. I REALLY wish I had these things back then, since I've acquired mild tinnitus as a result.

Now I carry them on my keychain all the time and use them even in restaurants and bars or whenever I'm some place where I have to speak at an elevated level.