To quote JRoss: "...Thanks...again I say this is like a clock sound but not regular, it can start even in volume and intervals but can speed up and slow down...of course at first I thought it was insects of some kind but after investigation I was left with "well it has to be some invisible energy of somekind? possibly another dimension?"

Yup, and I have had my hearing checked. Tinnitus has been ruled out. The ticking speeds up and slows down. Mostly about two beats per second, though. It remains in the background most of the time, but can get loud and annoying. If you tell it to go away, sometimes it does. I live in the forest...there are insects everywhere...but the source seems to be the ceiling area, and I see no one up there. This is truly a puzzle...and I didn't worry about it until this post!
