Yes, I have bilateral tinnitus. It started in my left (non AN ear) many years ago, around the time I began to have hearing loss in that ear. Fast forward to June of 2012, and I began to have episodes of horrible vertigo, so my doc sent me to an ENT. He ordered an MRI, pretty sure I had an AN in my left ear, since I was practically deaf in that ear. Imagine his surprise when the MRI showed a "Large" acoustic neuroma in my RIGHT ear. He had his audiologist do a hearing test that day and lo and behold, I had some moderate hearing loss in the AN ear.
Around this time, the tinnitus in my non AN ear began to get louder, but I had none in my AN ear.
I had 25 radiation treatments on the right side, and with the exception of one episode of almost deafness in my AN ear which started 1 day after my treatments were done (treated with Dexamethazone, with good results) I did not notice any difference in my hearing until about a year later. The tinnitus began about then and although it has increased slightly, it is nowhere as bad as the non AN ear.
I got a hearing for the AN ear about 10 months ago and noticed that the tinnitus did calm down a bit. And 3 months ago I got a second aide for my (almost) deaf non AN ear. I have a very narrow band of hearing in that ear. I have noticed a slight decrease of the tinnitus in the non AN ear. And as someone in another thread said, if I'm going to become deaf, I may cherish the tinnitus. I can not imagine absolute silence! I'll always have my chirps, buzzing of the ever present mosquito, and, at times, some kind of musical tune to keep me company.