On the off chance that this helps: I get tinnitus when my neck and/or jaw are clenched. This is a known phenomenon, you can google it. In fact, the onset of tinnitus is sometimes the only thing that makes me aware of how tense my neck is. If you were in a collision, it's possible your nervous system as adopted a pattern of muscle tension to compensate, or in anticipation of trauma, or something. Anyway, perhaps try relaxing your neck/head/jaw when this happens?
I appreciate the suggestion. I do have a bit of aftershock (I avoid calling it PTSD) where if I'm sitting waiting for a left turn where will I suddenly get a weird flinch feeling without actually flinching.
For me, the ringing is only noticeable when it is quiet, so bed time is annoying. I run a small fan for the white noise to compensate. Other times of the day, music is playing while I'm working (not headphones).
