Hi Started in 30 November 2013. My head was ringing like 10000 hz when it started. After 3 months and now my head ringing like 17850 hz I am 21 years old I'm only able to hear them when its quiet. I don't know what is the cause of my tinnitus. It never bothered me. Never. And now ı habituated %100. In fact, most of the time, I am not even aware of it. I can only really hear it when I am in bed. It was just sounds in the background, nothing more.