CAN DEAD PEOPLE HEAR ?

I am not sure about the auditory skills because ghosts have no body but they can receive our thoughts and that is Definitely yes!! 

As I have always said, thoughts are energy and energy has vibrations, which can reach living or dead people all the time. Spirituality tells us that a soul is most vulnerable when it leaves the body. The soul is very confused and is also unhappy for leaving its loved ones. Plus is able to see the entire lifetime which it just left as a movie being played on its memory disc. The soul is disheartened and helpless to console its loved ones. It is catching every negative or positive thought. The thoughts of sadness, anger, sudden demise, or loneliness are all felt by the soul who has left the body. Even if it goes into a new body immediately it is not attached to its new body but is still with the old set of people and is sad for leaving them. A soul can catch any thoughts given by the family it was in a few days back. It is also a belief in Hinduism that the deceased person lives with the family for about 12 days and then moves on its journey.