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Electronic voice phenomena
- or EVP - is a mysterious event in which human-sounding voices from an unknown
source are heard on recording tape, in radio station noise and other electronic
media. Most often, EVPs have been captured on audiotape. The mysterious voices
are not heard at the time of recording; it is only when the tape is played back
that the voices are heard. Sometimes amplification and noise filtering is
required to hear the voices.
The quality of EVP also
varies. Some are difficult to distinguish and are open to interpretation as to
what they are saying. Some EVP, however, are quite clear and easy to understand.
EVP often has an electronic or mechanical character to it; sometimes it is
natural sounding. The quality of EVP is categorized by researchers:
- Class A: Easily understood by almost anyone with little or no
dispute. These are also usually the loudest EVPs.
- Class B: Usually characterized by warping of the voice in
certain syllables. Lower in volume or more distant sounding than Class A.
Class B is the most common type of EVP.
- Class C: Characterized by excessive warping. They are the
lowest in volume (often whispering) and are the hardest to understand.
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