Electronic voice phenomena (EVP) refers to the purported manifestation of voices and sounds of paranormal origin on electronic media such as radios and tape recorders. Proponents of EVP commonly attribute the phenomenon to communication from ghosts or spirits, although others have suggested alien communications or psychokinesis from the living as possible explanations. The explanation that EVP are produced by spirits of the deceased was first introduced by American photographer Attila Von Szalay, who believed he recorded the voice of a dead loved one in 1956.
EMF Detector - The Electromagnetic Field Detector, also known as an EMF, is the modern day ghost researcher's tracking device, a very important piece of equipment. With this instrument it is possible to locate and track energy sources. It will detect fluctuations in electromagnetic fields and low strength moving EMF fields that have no source. It is a common theory that spirits disrupt this field in such a way that you can tell one is present by higher than normal readings with this meter. Before using the EMF as a ghost research tool on an investigation be sure to walk around the area and take initial readings around energy sources such as light poles or electrical outlets to be sure of the readings you receive while scanning the area during the investigation. Most units when purchased come with a manual describing most household and major appliances and their corresponding electromagnetic reading. When using the EMF as a tracking device look for fluctuations of 2.0 to 7.0, this usually indicates spirit presence. Anything higher or lower is normally has a natural source.
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Vortexes (vortices) – “funnel-shaped” energy usually encompassed or comprised of ectoplasm. Some believe this to perhaps be
a portal or opening between the spiritual and physical worlds. Others believe these to be nothing more than the camera strap
having been accidentally photographed. Many times a camera strap gets into the photograph by accident and looks similar to a vortex.
Apparitions – the Holy Grail of ghost pictures; capturing a full-bodied spirit in a “see-through” human form. These are rare, and
some ghost hunters maintain they are not possible to capture. It is possible to create false apparition ghost pictures by lengthening the time the shutter remains open or shooting into glass and create a glass apparition false ghost photograph