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Infrasound

Article: PRAB-CI-819
Article by: Ian Murphy, Paranormal Research Association of Boston

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Something not many people know, is that sound can make you feel and hear things. Ultra‐low
frequency sounds can have an effect on the body and mind, as EMF can affect the brain.

Purpose:
To explain what infrasound is and what effects it can have on the human body

History:
In 1998, computer specialist Vick Tandy from Coventry University always spent a lot of time in his
laboratory. On one night, he suddenly broke into a cold sweat. He felt somebody was watching him
with sinister eyes. Suddenly, a gray material form crossed the room and approached Vick. In the vague
outline Vick could discern legs, arms and fog where the figure must have a head; there was a dark spot
in the center of the fog which might be a mouth. The vision disappeared in the air without leaving a
trace.

Soon Vick Tandy managed to discover the factors quite accidentally. Vick's hobby, fencing helped him
with it. Some time after the scientist saw the "ghost" he brought his rapier to the laboratory to set it
right before a forthcoming fencing tournament. Suddenly Vick felt the blade gripped in a vice started
vibrating more and more as if some invisible hand touched it. Vick suddenly arrived at a conclusion
that the moving of the blade was resonance oscillations caused with sound waves. He measured the
sound in the laboratory and was surprised to see that the sound in the room was incredibly loud; the
sound waves were inaudible, but the oscilloscope detected a large amount of noise.. That was
infrasound. It took the scientist a lot of time to find out the source of the infrasound; it was emitted
by a recently set ventilator in the air conditioner. As soon as the air conditioner was switched off, the
blade stopped vibrating.

The same can be said for the crew of “The Flying Dutchmen”, ships that wandered around the seas
without crews on board. The ships were in good repair, but there were no personnel on board. The
mystery was unsolved for decades, until it became clear that infrasound was the explanation of the
phenomenon. As it turned out, infrasound of seven hertz emitted by ocean waves under some
definite conditions was the reason of it. But infrasound of seven hertz is terrible for people: they may
go mad and throw themselves overboard.

Further investigation of the phenomenon revealed that sound waves of this low frequency may
appear rather frequently under natural conditions. Infrasound arises when strong gusts of wind clash
with chimneys or towers. These heavy basses penetrate even through very thick walls. Such sound
waves start rumbling in tunnel‐shaped corridors.

What is Infrasound?
Infrasound is sound with a frequency too low to be heard by the human ear. The study of such sound
waves is sometimes referred to as infrasonics, covering sounds beneath the lowest limits of human
hearing (20 hertz) down to 0.001 hertz. This frequency range is utilized by characterized by an ability
to cover long distances and get around obstacles with little dissipation.

Infrasound has been known to cause feelings of awe or fear in humans. Since it is not consciously
perceived, it can make people feel vaguely that paranormal events are taking place.


Scientific studies (Infrasonic Research):
On 31 May 2003, two concerts were staged, back to back, at the Purcell Room London. Each concert
featured an hour of contemporary music for piano and electronics, performed by Genia and a new
film piece by Ravi Deprees, specially created for the event. At four points during the show, the
audience were asked to fill out a page of a questionnaire. This was designed to measure their
emotional response to the music and log any unusual experiences (such as shivers down the spine).
The questionnaire and psychology experiment were designed by psychologists Ciaran O’Keefe and
Professer Richard Wiseman

Just before two of these points, as the audience were absorbed in the film and music, the project
team flooded the auditorium with infrasound. The infrasound was produced by a specially made
generator and had a frequency of 17Hz.

The two Purcell Room concerts were identical in every aspect, except the use of infrasound. If the
generator was on in one piece in the 3pm show, it was off in that piece in the 5pm show (see which
pieces had infrasound below). We were careful to use the infrasound at moderate levels so it would
be on the cusp of perception. The music masked the infrasound ‐ in theory this meant the audience
were never fully aware of its presence. Varying where we put the infrasound enables us to rule out
the emotional effects of the other elements of the concert (the music, performance and film).
During the concert, infrasound boosted the number of strange experiences reported among the
audience, even among those who were unaware of its presence. Unusual reports included a sense of
coldness, anxiety and shivers down the spine.

On average, infrasound boosted the number of strange experiences by around 22%. It also increased
the intensity of any feelings reported. Many unusual experiences were reported during the concerts,
ranging from the emotional (e.g. ‘sense of sorrow’, ‘brief moment of anxiety’, ‘excited’) to the
physiological (e.g. ‘increased heart‐rate’, ‘headache’, ‘tingling in neck and shoulders’, ‘nausea’,
‘sense of coldness’). The majority of reported experiences were physiological.

Which body parts are affected?

 SymptomsFrequency (in Hz)
 Abdominal pains 4 - 10
 General feeling of discomfort 4 - 9
 Influence on breathing 4 - 8
 Muscle contractions 4 - 9
 Chest pains 5 - 7
 Lower jaw symptoms 6 - 8
 Urge to urinate 10 - 18
 Limp in the throat  12 - 16
 Head symptoms  13 -20
 Influence on speech 13 - 20
 Increased muscle tone 13 - 20
 Eye resonance  16 - 19
 Human auditory range 20hZ - 20kHz

Conclusion:
When performing a paranormal investigation, it is infinitely important to take the factor of sound as
well as EMF into consideration for a probable explanation for perceived paranormal events.

 

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