Electro Magnetic Fields
Electro Magnetic Fields (EMF) are in definition, exactly as they are titled. Many types of regular objects give of EMF. During investigations, an EMF detector is used to try to communicate with entities by giving the entity a visual representation of their answers.
Similar to the way that an EVP is used to detect answers to questions on a digital audio recorder, EMF detectors are used to give fluctuating readouts of possible responses to questions or locations of ghost or energy fields.
The other use for EMF detectors is to identify fear cages. Fear cages are locations in places where unshielded wires or high EMF fields are constantly present. People who are sensitive to EMF fields may experience pressure, headaches or other neurological reactions.
These sensations may also include feelings of being watched as your body tries to identify the sensations of high EMF fields.