W.R.A.I.T.H.

 Electronic voice phenomena (EVP) is the communication by spirits through radios, tape recorders, or other electronic devices.Voices and sounds from beyond that are captured and recorded. These voices often represent a physical manifestation of a spirit attempting to contact the living.

 Shadow people are a supernatural phenomenon seen as a dark form at the edge of a field of vision that disintegrates, or moves between walls and also appear or manifest just in a darker form than others, but these are often no different from other spirits.