Electronic Voice Phenomenon
Electronic voice phenomena, abbreviated as EVPs or the singular, electronic voice phenomenon or EVP, are sections of noise on the radio or electronic recording that reveal sounds resembling voices speaking words. Paranormal investigators sometimes interpret these noises as the voices of ghosts or spirits. Recording EVP has become a technique of those who attempt to contact the souls of dead loved ones or during ghost hunting activities. EVP are typically brief, usually the length of a word or short phrase, and the frequencies of these sounds are reportedly well below the range of sounds that can be perceived by the human ear.
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These EVP voices are part of man's endeavor to establish contact with the other world by means of instruments. The first attempt seems to be of Jonathan Koons in 185s. Blueprints or a diagram or schematic of his "machine" have never been found.
Thomas Edison, a Theosophist, predicted the invention of such a machine in the twenties. Tesla and Marconi reported having received mysterious signals and the Italian Prof. Cazzamali conducted experiments from the twenties onward until World War II.
A new wave of interest arose when Friedrich Jurgenson reported in 1959 to have recorded mysterious voices on tape. Subsequently Dr.Konstantin Raudive devoted much of his life to experiment with this phenomenon.
The voices are usually embedded in other sounds on the tape. They are very short and require a trained ear to detect and interpret them. Direct voices on the other hand can be heard as any other sound by every one present, be it that they emanate from a point in space. The attraction of the EVP registrations is, however, that they can be received by anyone.