Eddie Johnson has pretty well covered it. Possible every person as we age gets some form of Tinnitus. In my case I hear a low bass drown but only in the quite of the night if I wake for whatever reason. At first I was walking around our Bungalow in the middle of the night looking for the something I had left switched on.

Tinnitus comes and goes and nothing can be done, so live and cope with it....it's not life threatening and although unpleasant it's a matter of coming to terms with it.