I have it after I shot an indoor USPSA (IPSC) match right after a major ear infection. I always wear double ear plugs and muffs. The ENT I saw said he thought it was the infection that did it not the shooting. My hearing test came back very good despite the ringing. It’s always there, especially when it’s dead silent but after about four years, I don’t think about it anymore most of the time. I always wear shooting grade earmuffs even when doing yardwork with a lawnmower and the weedeater, I baby my hearing the best I can. It is a good reminder that we only get it once.
I got mine too after an infection.
What's weird is sometimes I wake up and then all of the sudden I hear it starting.