Brain Waves For Angry Dreams Discovered By Sleep Scientists Several people have often complained of hearing unknown noises that others could not hear. Spiritualists often claim that this phenomenon is due to the presence of supernatural forces, and they usually treat people who hear these voices using exorcism. However, medical science classifies this phenomenon as a psychiatric condition. And now, a new study has found that some individuals are prone to hearing the dead, and they believe that this could be due to their capability to perceive sixth sense. Representational ImagePixabay How people hear the dead? According to researchers who took part in this study, people who hear these voices are experiencing clairaudient communications. During the study, researchers surveyed 65 clairaudient mediums from the Spiritualists' National Union and 143 ordinary people to examine the phenomenon of hearing the dead.