vision takes up a good bulk of our consciousness as it is our primary sense so it makes sense that most people who are psychic are prone to that kind of functioning. Hearing has played a role in some experiements in psychic functioning as well. One that comes to mind is the hunt for son of sam. detectives used psychics to try to locate him and one psychic was able to narrow down the place where he worked to a postal area and i believed mentioned hearing the sound of clinking keys. among other things those kinds of details pointed towards him being some kind of worker in a post office, which later turned out to be true.