It is believed that spirits are comprised of energy. In order to speak, make a noise or manifest in the form of an apparition, ghosts need to gather energy to do so. They use electricity to "build up" energy to give them enough power to make themselves known from the other side. EMF detectors are often used by paranormal investigators to measure electromagnetic fields at a location. After taking a base reading of the location, any fluctuation by an EMF detector that happens in conjunction with a noise, sighting or
EVP recording, might possibly indicate the presence of a spirit. If you know the locations of the natural electrical energy of the location and have the base readings, any fluctuation in the meters can be a valuable asset to the investigator.
