The Nature of
EVP
The Nature of
EVP
Written By Tom Butler (Co-Director of AAEVP)
This Excerpt appears courtesy of the AAEVP. For the Complete article go here, http://www.aaevp.com/articles/articles_about_evp4.htm
EVP
messages have been classified by AAEVP Founder Sarah Estep as Class A, B or C:
Class A: easily heard and understood from the speakers of a sound system
Class B: can be heard over the speaker but there may not be agreement as to the
message. Some words may be agreed on.
Class C: can only be heard with headphones and difficult to understand.
EVP messages are often preceded by a sound that has been described as a "click"
or a "thud." A physical world analog to this sound is the sound that was heard
on old Citizen Band radio sets. When the send key was pressed, there was a brief
burst of static before the voice was heard.
Messages are usually in the language of the experimenter, but individual
experimenters have received other languages. For instance, an English and German
message has been received in a single session
Message Duration
-------------------
EVP message length is typically very short, ranging from one word to short
sentences. Several experimenters have found that messages will usually be less
than two seconds in duration. Popular theories for why this is so are:
# Aspects of quantum physics suggest that there may be a definable limit to
the amount of EVP information that can be transmitted in a single message.
# The energy required for transmission of messages is limited by available
physical energy, such as that provided by sound, electricity or light.
# The experimenter's personal mediumistic ability is a limiting factor for
message length.
Reverse Messages
---------------------
Messages are often found by listening to the reverse direction of a sound track.
When audiotape is used, the tape is played in the reverse so that the
experimenter's voice is heard as reverse "gibberish" but entity words are
clearly heard as if played in the correct direction. When a computer based sound
editor is used as an audio recorder, playing the sound file in the reverse mode
will often disclose messages.
Voice Frequency Shift
-----------------------
The voices involved in EVP messages often exhibit a shift in frequency outside
of the normal human voice, frequency range. The human voice generally ranges
between 300 Hz and 1000 Hz. EVP voices have been measured to1400 Hz.
Entity Voices
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Entity voices may be clearly male or female, old or young, even mechanical or
"human" sounding. Some messages are delivered in a singing voice. However, the
messages are delivered, they have distinguishable characteristics, from which
information can be inferred beyond simple message content.
Visit the American Association of Electronic Voice Phenomena (AAEVP