Method of EVP Recording (NyMER)- Quadraphonic
Recording of EVP Sessions for the Purpose of Determining the Location of
Origin of Captured EVP’s.- First Experiment
Mitch Silverstein1, Kevin Silverstein1
Paranormal- Nyack, NY
March 22, 2010
EVP (Electronic Voice
Phenomenon) appears to be the most common form of data collected at
paranormal investigations. Nyack Paranormal
has designed a system where EVP sessions are recorded through four
channels simultaneously; Nyack Method of EVP Recording (NyMER). Amplified
microphones were evenly spaced in a square within the area to be
recorded. The microphones were calibrated with a constant tone in the
center of the room. Standard EVP sessions were conducted as the four
channels, perfectly synchronized, were recorded to a laptop computer. If
audio was found that was of a unique origin, an analysis of the sound
was performed. The wave form peaks were measured and compared at the
exact same point on the recording time line. The quantified data was
processed with software specifically written for the experiment.
In one session, three instances of unique audio were captured. In two of
the instances the sound was heard live by the participants and the
software generally located it to the point in the room where it was
heard. The third instance is a possible EVP which was located close to
the point in the room where an investigator was standing. This may
possibly show that the EVP communication was directed specifically to an
individual not only as an intelligent response but also by location as
being “in your face”.
A room or area was
chosen that would minimize echo and artifacts. The shape of the room
and size was not critical as the system is scalable, however it should
not be too small as to have the microphones too close together. We chose
the Gentleman’ Quarters at the Shanley Hotel in Napanoch, NY for the
experiment. The microphones were placed at the corners of a ten foot
square and calibrated for equal volume.
investigators in groups of four to five performed standard EVP sessions
that lasted approximately fifteen minutes each. Three groups rotated
through the room for three sessions total. The groups were allowed to
use their own investigation equipment as long as it didn’t disrupt the
the four microphone locations (1, 2, 3 and 4) and the 10’ x 10’ grid
within the Gentleman’s Quarters.
The first two sessions
did not produce any analyzable data. It is possible that it was too
early as the sessions started at 8:10 PM. We
will review the results from the third session which has three items of
The session began at approximately 10:20 PM. with our friends Chris,
Derek, Paul and Sandy from Tristate Paranormal of Northern Kentucky (TSP). Our recorder was running
throughout the break between sessions and into this session so our time
stamp is approximately fourteen minutes later than the groups own
original recordings. However, there were no problems synchronizing the
recordings for review.
At ~27:33 of our
recording, a low voice, almost a whisper can be heard saying “put that
(it can be heard at the 23 second mark of this clip). It barely
registered dB peaks in the recording software. The analysis with the
Spinar software showed the voice originate approximately where Chris M.
was located, standing at the foot of one of the beds (Figure 9).
9. The location of voice saying “put that down”. A= Chris M; B= Paul S.;
C= Sandy B., D= Derek M. (T.S.P.). Values: Mic 1= -45.4 dB; Mic 2=
-36.7 dB; Mic 3= -40.6 dB; Mic 4= -41.5 dB.
Chris M. was using a
device that projected a colored spot of light. It is possible someone
in the room asked to put it down, but not likely as it is a useful
instrument that they use on investigations. Voice spectrum analysis was
reviewed using Pratt software. There is a resemblance between the voice
captured Paul’s frequency pattern but not an exact match. This
comparison is not conclusive but may lean towards a novel voice captured
on the recording (Figure 10).
10. showing spectral analysis of voices. X-axis is frequency in Hz and
the Y axis is time. All show low tones, however, “put that down” shows
similar patterns to other voices in the room at a much lower volume but
not an exact match.
At 34.48 of our recording, a member of the group in session provided the
usual “shave and a haircut” knock on the wall. It was proceeded with a
response to which all in the room reacted. The group detected that it
came from the far end of the room, possibly two taps on a glass fronted
wall clock which was not running at the time. Listen to the recording
Inspection of a video that was taken during the session by the group
showed heads turning in the same direction of the wall with the clock.
Spinar analysis confirmed the sounds originated generally from that end
of the room (Figure 11).
11. The general location where the tap tap response was heard. This
picture shows the circles in the Spinar software that calculates the
intercept showing the general locations of the sounds based on dB
measurements from the Adobe Audition recording. Values: Mic 1= -23.6 dB;
Mic 2= -45.3 dB; Mic 3= -26.5 dB; Mic 4= -48.9 dB.
The Spinar software did
show the general location of the sounds. It did locate it central to
the far wall and well outside our recording grid. When we lower the
Sensitivity setting in Spinar it brings the location much closer to the
wall and within our two foot expected error.
At approximately 38:28
of our recording there were a series of thumps captured. Upon careful
review they appeared to sound like footsteps. The group responded as
everyone heard them live in the room. Listen to the audio
point on the audio Derek states it sounds like it is coming from an area
by his feet. The Spinar analysis shows just that. The sounds were
coming from the area by the foot of the bed (Figure 12).
12. The footstep sounds originated in the area between the two beds.
1= -21.2 dB; Mic 2= -39.7 dB; Mic 3= -25.3 dB; Mic 4= -46.1 dB.
recording rig performed well. The quality of the recording was fine and
the frequency response recorded was as expected in the voice range
between 100 – 5000Hz. The calibration procedure there went
Upon completion of each
session, several participants reviewed their voice recorders for
"hits". The third session hits were reviewed on the quad recordings and
all sounds captured on the voice recorders were also captured on the
quad recorder although the quad microphones had a more limited frequency
As the hits were located
on the quad recordings using Adobe Audition, each channel was reviewed
for the sound and a higher peak was selected with the time stamp to the
hundredth or even thousands of a second was noted. The exact measure on
each channel at this point was entered into the Spinar screen.
The location was not
precise. The accuracy was determined to be within approximately three
feet relative to the 100 square foot area grid (within 1.5 feet in nay
direction). This level of accuracy still has significant ramifications
however. It can shed much insight into whether a sound comes from within
the room being investigated or imprinted on electronics. A standard
recorder or stereo recorder can not provide this information. It can
also help determine if the sound was of human origin by knowing the
locations of the participants and locating the sounds around them. even
further, it can determine whether a sound comes from well outside the
grid and may be contamination from another room or outdoors.
possible EVP mentioned above, “put it down”, may provide information
that may have significant ramifications in EVP research. If we consider
that the location found for this voice was basically right on top on an
investigator, then this may show that the EVP communication was directed
specifically to an individual not only as an intelligent response but
also by being “in your face”!