I'm not one to watch television on a regular basis, but there is one show I truly enjoy...Ghost Hunters. It's a SyFy offering that you can catch weekly. As the title suggests, a group of paranormal investigators travel throughout the United States and Canada investigating locations thought to be haunted. The shopping list is expected (shadow characters, apparitions, voices, footsteps, moving objects...etc.). It's always approached by this crew as an effort to debunk the claims and then collect evidence on what they can't explain. It's fun.
That's where Albert Einstein comes in with his Theory on Relativity. Einstein was convinced beyond a shadow of a doubt in his later career that time doesn't exist in a linear fashion. Instead, it was his conviction that the past, present and future all exist at the same time. Do you see where I'm going with this? It is all one single existence.
Since there exists in this four dimensional structure [space-time] no longer any sections which represent "now" objectively, the concepts of happening and becoming are indeed not completely suspended, but yet complicated. It appears therefore more natural to think of physical reality as a four dimensional existence, instead of, as hitherto, the evolution of a three dimensional existence.--Einstein (1952)
So, the footsteps heard above the paranormal investigator in a seemingly empty attic with no floors is, in fact, a "real time" sound of the past. Only, it isn't really the past. So if past, present, and future all exist simultaneously, is it any wonder that the T.A.P.s guys hear things like this?
When you evaluate a significant number of Electronic Voice Phenomenon (EVP) collections, those subjects that seem to possess intelligence in their answers indicate that they do not believe they are dead. Perhaps they aren't. They're just confused as to how a voice seems to pop up out of the ether asking them questions in their bedroom.
On a side note, this brings all kinds of fascinating questions to the forefront in reference to the mechanics of some serial killers out there. Hearing voices in one's head takes on a whole new meaning.