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Peter Venkman and Egon Spengler used PKE meters in Ghostbusters, but "real" ghost hunters use EMF meters as a key tool in their arsenal to detect spirits. EMF detectors come in many forms, the most common being the EMF detector, tri-field meter, K2 or Mel Meter. It is a common belief that a sudden spike or disruption in EMF, or Electromagnetic field, is a sign of that a ghost or other paranormal entity is close by. Spirits are believe to be able to manipulate these meters simply by getting close to them.
What is EMF?
To understand this theory we must first examine the science behind EMF. An electromagnetic field (EMF) or EM field is a physical field produced by moving, electrically charged objects. These fields are commonly found in power lines, home wiring, airport and military radar, substations, transformers, computers, appliances, and even in cell phones.
Ghosts and EMF:
It is a common belief in the paranormal community that ghosts or spirits are made up of some form of electrical residue or energy. It would stand to reason then that a sudden disruption in the EM fields can be a sign of a nearby presence, right? Not necessarily. While most in the community accept this theory, there is actually little scientific evidence to positively link high EMF with spirit activity. Could these spikes be coincidence? Could they be caused by some mechanical or even earthly phenomena? These are questions we are still trying to answer.
While most EM fields in the home are too low to be detected, some older homes with unshielded or bad wiring can produce high EMF. Some individuals report "hypersensitivity" to electric or magnetic fields. It is widely believed that the presence of consistently high EMF fields can affect certain people, causing aches and pains, headaches, depression, lethargy, sleeping disorders, and even convulsions and epileptic seizures. In the paranormal community, it is often believed that this sensitivity can also create feeling of fear and even cause illusions. For this reason many investigators will quickly write off paranormal activity in homes to EMF hypersensitivity.
Food for thought:
But what if the hypersensitivity theory is wrong? Recent Scandinavian studies found that individuals do not show consistent reactions under properly controlled conditions of electromagnetic field exposure. There is also no accepted biological mechanism to explain hypersensitivity. So how do we explain the correlation often found between high EMF and paranormal experiences?
Since we in the field believe that a spirit needs energy to manifest itself, could it stand to reason that these “hypersensitive” people are not sensitive at all? Can we argue that perhaps the high EMF is giving the spirits the energy they need to manifest and interact with the environment? In other words, is the high EMF actually feeding the haunting? If we use EM pumps to give energy to the spirits to communicate with us, what happens when the spirits have an unlimited amount of EM energy to feed from?