I have tinnitus myself too. It's possible there is too much background noise for tinnitus to be noticed in the first place so it could be more permanent than you realise. I get it because sometimes it's too quiet, and my ears need some music or something to stimulate the nerves and reduce tinnitus. It doesn't have to be a permanent thing, in my case, it happens every now and then and sometimes for minutes or hours.
I get whistling noises instead of ringing, it's like this constant high pitched sound that has nothing to do with my hearing aids because when I take them off, it's a lot worse.
