First month was constant ringing (beeeeep). Second month was a constant loud rthymic squeal that amplifies with sound Finally mid way of 3rd month I now have a hiss all during the day and at night when i lay down to rest i hear fizzing/hissing with occasional squeals. Still amplifies with sound yet not as much. My Tinnitus started after a head injury. Normal hearing yet struggled through 4 difficult months. Wondering if any others have seen changes in there Tinnitus from onset?