[technothrasher]

I don't know what anybody else hears in absolute silence, but I hear a high pitched ringing. I can hear it any time I think about it. Like the other poster said though, my brain filters it out typically when other noise is around and I'm not paying attention to it.

[turnsout]

Same. I guess that’s tinnitus, but I feel lucky that most of the time I seem to filter it out.

[rossant]

I realize just now I hear this as well. Always have. Always thought it was normal. Guess it isn't.