My hearing is fine, for now, but I have the same "bobble-head" syndrome that you do David. I constantly am turning my head so I won't get caught flat-footed and I resemble the audience at a tennis match. When I asked about this problem a few years back, several people suggested the miror technigque that has already been suggested.

My problem is this:

I go to great lengths to cover up and paint over any glare or shiny surfaces in my hunting gear. I felt that introducing a mirror to the woods might be counter-productive to all that effort.