Come to think of it, I have experienced a sensation similar to buzzing, but maybe I interpret it differently and that's why I didn't think of bees. It is a loud sound that encompasses everything it seems, kinda like the sound of static on TV. I remember when I first started experimenting with altered states my hearing would become extremely enhanced (maybe merely due to stillness of other senses)...I would then hear all kinds of loud noises that were actually very soft noises amplified. One loud noise that I immediately interpreted as an intruder shuffling noisily down the hallway was actually the soft sound of my husband breathing next to me.

It's quite amazing that you can consciously experiment seeing with your eyes closed. I'd take advantage of that and continue to experiment. This happens to me spontaneously. A few times, it was like one set of my eyes opening, then another, and then my actual eyes, all in succession. I also see the room just as it is, or slightly altered (missing furniture for example). One time when lying down to sleep, I began to see through the wall to outside (with my eyes shut). What I saw out there was just as it is in real life behind that wall, but in the sky I saw a beautiful crystaline space craft.

As far as out of body or astral travel, I've come to think that it may well be the ability to focus your attention and inner vision outside of your body. I have so many times seen what is happening outside of my house while I am inside in an altered state (expanded awareness). What I see is usually very much like it would appear to my physical eyes, however, within the landscape I see things that I do not see with my physical eyes, such as space craft (as I said above), entities, spirits, and sometimes the landscape is altered in ways as well.

I believe that what you are seeing is the larger reality. Keep believing, keep allowing, keep seeing...and keep me posted, please.