I'd heard about this. Their studies seem to have mixed results, and there's mixed anecdotal evidence on /r/tinnitus at best. I looked into it, there's a clinic near me that offers it, but it's $5000!

My tinnitus isn't so bad that I feel compelled to drop 5g on fixing it, but I think their idea seems promising and I hope they continue to research it and find new ways to treat it.