Well, I don't really know of someone who can explain every single noise they hear. It isn't that important. Besides, from my experience with scary stuff, I recall being fairly skittish at slight noises. Doesn't mean every noise is out to get me. It basically your mind over ex agerating common occurrences due to something your mind associates those noises with that are rather harmful to ones health if real or not.
When I hear something I always expect something but if a few minutes pass I pass it off as nothing.
I mostly expect some trespasser to come by, if I think someone is out my window I don't even hesitate to get the bat and knife and walk outside to confront whoever it is even though I know it can be a number of things..
Last thing I want is to run into a fox because I heard those things will tear you to pieces.
But yea not all noises are out to get you and very rare is it a ghost but sometimes it is.
I have a couple more stories I never added but I can actually pass them off.
I was eating breakfast alone and I heard footsteps.. It was in the AM and it was dark so I was just hearing stuff... That house still haunts me.... The loving voices! They haunted me all night long.. The screams.. The terrifying screams and the noise of hammering.. Those screams dammit! Those loving screams!