Mine went away, It took a long time and it was the hardest period of my life but it did go away. When I first visited my doctor and then a hearing specialist I was told it would never go away. Three years later when I finally got my appointment with ENT and I explained it had gone away, he actually didn't believe me, asked if I could hear it again now that we are talking about it and I said no. He was shocked.
Obviously the chances of it going away depend on how you acquired it but in my opinion (and it is just from my experience) I believe acoustic shock or sudden loud noise exposure, is different from long term noise induced tinnitus and therefore nerves can repair over time and tinnitus can fade away. It does take a long time, If it dosent fade totally it can be managed and you can deal with it but everything takes time.