Clairaudience most often takes the forms of whisper and murmur, just at the boundary of imagination. Every once in awhile, though, clairaudient sounds are experienced as both profoundly physical and truly external.
Ghosts and spirits guides are not the same thing. These are the events that prompted my transition in discerning between them, and how by failing to pay attention to the voices of spirit I learned to listen.... Part 4 (Final segment) of the Paranormal Memoir Waking Ghosts