I have it probably from my years working with Bands.
It is constant every moment I am awake if I actually listen for it.
I guess I learned to live with it as it only pops into my attention when it's bed time.
I sleep with ear plugs and the ringing is very pronounced then.
When I have the ear plugs in?
I hear variations of the ringing depending on many factors.
Are my jaws clenched, am I under stress and tense, etc.
It's not a fun thing to live with as I have for over 20 years, but dwelling on it makes it impossible to live with.
I didn't even notice it today until I read this thread!!
Kind of like smelling skunk.
If you smell them everyday you only notice when thier gone.