Miscellaneous Articles - EVP Carrier
Written by Bob
WARNING .......... do not attempt these
experiments if you are not spiritually and/or psychologically prepared
for any message(s) you may receive .......... you proceed entirely
at your OWN RISK
This technique, now known as
an "EVP Carrier", has been in use for some years.
The process uses a random sound (the Carrier) which is close in pattern
to human speech. This is played, questions are asked and hopefully
a recording device captures EVP.
There are two theories as to
why it seems to often work:
1) It's psychological, once a question has been introduced, the random
sounds that were present from the start are interpreted by the mind
as an answer.
2) Normal EVPs are rare because spirits don't usually have enough
energy to communicate but by using a Carrier they are able to manipulate
the sound and get their message across (a process which is believed
to require less energy).
To help rule out the first
theory, I have created a "Carrier" using foreign speech and a computer
application which randomly cut up and reassembled the speech so it
no longer sounds like the original foreign language let alone English.
I have also inserted "pitch markers" (beeps) into this sound file
at regular intervals.
To further rule out theory number one, I have devised the following
process which may at first appear complicated but basically during
an investigation all it entails is making two recordings each approximately
three minutes long, the complicated stuff is done post- investigation.
During an investigation:
a) The Carrier will be played and recorded by a second device, the
location must be quiet and free from outside noises such as traffic
etc. This recording becomes the Control and contains the acoustic
properties of the room.
b) The Carrier will be played and recorded again but this time the
Carrier will be paused between each set of pitch markers to ask a
question of any spirits in attendance. The recording device will be
left running throughout, after each question the Carrier will immediately
be restarted and hopefully any EVP will be recorded.
During process a) and b) everyone within the location must remain
quiet (except the person asking the questions) and in the same position
otherwise the acoustic properties of the room will change.
Post-investigation: should any potential EVP be heard on the second
recording, by using a spectrogram application on a PC, its sound waves
can be visually compared against the Control to see if there is a
change, the pitch markers are there to enable both sets of sound waves
to be lined up for comparison. If there is a visual change and providing
there were no man-made sounds during both recordings it means that
the sounds weren't there in the first place and it's more likely that
the Carrier has been manipulated by paranormal means.
The following image shows how
both sets of sound-waves can be lined up using the Pitch Markers and
compared, in this case the change on the lower image was a deliberate
man-made sound for demonstration purposes:
White Noise has frequently been used
in the past as an EVP Carrier, usually achieved by the use of a radio
tuned between channels. The radio is left playing 'static', either
questions are asked and the sound is recorded or the radio is simply
left in a location with a recording device running.
Later playback of recordings are occasionally heard to contain words
or messages supposedly from the spirit world.
Critics argue that these words are naturally occurring - merely bits
of radio broadcasts straying into unused frequencies.
Hopefully, to disprove these critics I have created a White Noise
sound file using a signal generator computer application. This sound
file replaces the radio and is 100% free from speech or anything that
could be interpreted as such.
|The image, to the right, shows
how White Noise appears in the spectrogram: