I blame Motörhead for mine.
I can genuinely blame Phil Lynott for mine, when he played the greatly missed Golddiggers in Chippenham. I was stood right at the front by the right-hand speaker stack, and they were bloody loud! Mine is a gentle whistle/ringing louder in the right than the left.
Much more recently I’ve started to get an odd sort of gurgling/crackling sound in my right ear, that comes and goes. It can last for ages, then disappear, only to reappear again. I can hear the slight dining/whistling sound in my left ear at the moment, while I’m watching Antiques Roadshow, but nothing in my right at the moment. I sometimes wonder if it might be a wax buildup acting against the eardrum – I recently had a health checkup at work, including an ear examination, and that recorded my hearing as being excellent for my age, and no obvious obstruction or other issues.
I just ignore both and get on with things, the arthritis in my right knee and the carpal tunnel issues in my wrists is far more distracting and uncomfortable. The cataracts I’ve been suffering from have also been far more worrying, but one has been done, and I’m expecting notification for the other one to be done soon, so a bit of ringing in the background is nothing that bothers me