Welcome to the club. I too had it appear suddenly one day and that was about 5 years ago. I personally have had little success in eliminating the ringing. As to the annoyance factor - it has faded to a degree over the years. I have also learned to sleep with my good ear down so that ambient noise in the room works to mask the ringing to a degree. I have noticed that when diving it almost goes away....no clue about why.