I'm afraid there's no one in the world who's T really went
But T totally stopped/went away? I do not know a story of the person itself.
Well... there are normal sounds that the nervous system makes that anyone can hear if they start paying attention to them, and I think that the more you actively listen to such things, the better your brain gets at picking up on them.
Think about this old optical illusion:
We have probably all had the experience of initially seeing the faces or the vase in isolation, before the mind goes "a-ha!" and sees both. Becoming aware of your internal sounds can be a similar moment. Of course, once you have seen both images, it is no longer possible to look at the picture and not see both of them... likewise, once you've become aware of the sounds your nervous system makes, you can't un-hear them.
So, what's important here is drawing a distinction between "normal background electrical impulses which slightly stimulate the hearing apparatus", and "loud, intrusive tinnitus". So, I would suggest that no one has ever recovered from the latter and not still had the former, because that's a basic and normal part of human existence. But, I would suggest that some people have recovered from the latter to a point where they never think about the former, which is much the same thing. After all, what is the significance of the two faces vs the vase, if you are not thinking about or looking at the picture? There's a sort of Zen riddle in all this; "if you're in the forest and you have some tinnitus but you're not consciously aware of it on any level, does it make a sound?"