Only sounds im exposed to on average is creaking noises from my chair, opening and closing doors, typing on my keyboard and talking to my parents. I sit in my room pretty much all the time so i have the opportunity to sit in silence as much as i like, but that clearly does'nt matter given the consistent worsenings despite being extremely cautious.
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Also, whenever i do anything that my hyperacusis reacts to (Pretty much anything) i always make sure to cover my ears or just putting on a pair of earmuffs. So the possibility of it being noise related is just non-existent.
so you definitely are taking measures to prevent any kind of set backs your case is definitely unique man. I also suffered from reactive tinnitus since my onset so many unmaskable tones I even have the tuning fork one kinda sounds like a flute changing octaves every half second. I successfully had got most tones to die out and was left with a slight hiss but the flu has brought everything back