Nothing helps I am afraid to say :( I WILL say, however, this. I've tinnitus related to nerve damage in both ears. For the past 18 years both of my ears have been making at least 3 different sounds for 24 hours a day, 7 days a week, 365 days a year. You DO adjust to it! Am I still aware of it? Yes. Does it drive me batty like it once did? Nope. It used to affect my sleep and I just hated it. My hearing is still good, as long as the sound isn't in the same register/range as the noise in my years. I have noted that if I get a head cold then the range/tone/loudness changes. I do get my hearing tested more often than some to keep an eye on my overall hearing.
If you find a way to quiet the ring please let me know, but I thought it might help to hear that eventually it becomes ignorable.

