Everything is somehow vibrating. As far as I know we do not have the methods and/or technology to scientifically detect these vibrations — perhaps because they are extremely fast or immeasurably miniscule. But this does not deter the idea. I won't take an argument from ignorance like 'ghosts don't exist because I've never seen one.' That's ridiculous.
Your chair, your pencil, your monitor — its all vibing. If you sit back and close your eyes, it shouldn't be hard to just 'feel' the sensation in the room. Isn't that remarkable? I think you are picking up the vibrations of the area. I've posted two songs with this post, try listening to both of them. It amazes me how drastic the change is. Certain things, like music or people, must have extremely strong vibrations that override inanimate objects.