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Warning to the readers

Our research continues of the resonance phenomenon associated with ancient sites on brain activity using EEG

TAG: archaeo-acoustics, archaeoacoustics, hypogeum, Cividale del Friuli, resonance, infrasound, low frequency sound, shamanic drum, brain activity, EEG, SBRG, SB Research Group

Having completed the laboratory phase, the entire team and volunteers participating in this research have moved to Cividale del Friuli Hypogeum to directly test the effect of this ancient archaeological site on human brain activity waves.

It was clear from the outset, this was a far from an easy procedure to perform. The recent rains that occurred over this summer (similar to what we are accustomed to in November), infiltrated the ancient temple with an inordinate amount of water making it difficult to find anywhere try enough for the instruments to properly function.

In particular, the lower level chamber (chamber D on the map) was infiltrated by a few centimeters of water at floor level, making it incompatible with the operation of the instruments.


Fig 1 - - The entrance to the room on the lower level with a few centimeters of water, never seen before


Fig. 2 - The map of the Hypogeum of Cividale del Friuli. It was only possible to perform the experiment in chamber C (the least invaded by water)


We needed to minimize the amount of electronic equipment to avoid it fatally short-circuiting.

We used a portable electroencephalograph connected to a laptop computer on which we recorded the EEG tracks.

 Fig. 3 - The computer on which the recording of the EEGs were made


The chambers resonance was stimulated by a shamanic drum. But it was only possible to use this process in the upper of the two chambers where the resonance effect is present (room C of the map).


 Fig. 4 - Two different people played the shamanic drum during the experiment. In the image above you can see the exact location of the instrument in the resonance node


In practice the shamanic drum (similar to an "Irish" Bodhrán drum) was played by a person who took the place of the Mother Earth priestess  in one of the two resonance chambers, while the volunteer subject was seated at the entrance to the chamber. Exactly the point where they could have been seated when attending a ceremony in the past. Obviously the volunteer was seated firmly to not affect the EEG results through movement.



Fig. 5 – The volunteer seated at the entrance to the chamber while the drum was being played in the “sound node”


This method was impressive because whoever played the drum inside chamber C resonated it throughout the entire underground structure. Even those people outside of the chamber felt on their chest the drum beat. And even when the amount of water become excessive wetting the drum and pushing back the operator from the resonance node the effect of the sound on the bystander was equally powerful.



Fig. 6 – The positioning of the sensors on the head of the volunteers was not simple in this restricted and difficult environment

It was really hard working in the restricted chambers and so totally different than the acoustic room at the hospital with all the available equipment. The humidity was 100% and recent rains have meant that the water coming through the wall, falling in drops on the floor, has created a decidedly difficult situation. But we still managed to achieve our goals while maintaining equally high standards of our measurements.


Fig. 7 - The dark and cramped environment has made it difficult to carry out any procedure, but this research team still managed to get the required measurements




Fig. 8 – Reading and recording of EEG was accurately performed on a dedicated laptop


On this occasion we only tested four of the ten volunteers who have previously been examined in the laboratory (two males and two females, two experts in transcendental meditation), to develop an effective protocol to be repeated on all other subjects of the experiment.

From what we have seen from the first tracks, these temples were not for everyone, but only to the initiated people (or at least those trained in meditation and prayer). In fact, it would seem that the sensitive subjects have responded to the resonance effect of the Hypogeum with much higher brain electrical potentials, indicating that the effect of the sound on them was higher, making easier to go into a deep meditation in a short time.



Fig. 9 - The disturbing aspect of the so-called "têtes coupées", the guardians of the hypogeum of Celtic tradition, which accompanied in silence our measurements


During the period from September to October of this year we will continue the research until it has reached its conclusion.
Paolo Debertolis - August 8, 2014



A sincere thank you from SBRG research group to the owner of the Hypogeum, Mr. Gaetano Bront, for his willingness and kindness to divest its old premises for our experiments. Heartfelt thanks also to Mr. Federico Morandini who patiently gives us the keys to the Hypogeum for our research in every moment. Thanks also to Elisabeth and Mauro, technicians of neuro-pathophysiology, for their courage and professionalism in dealing with all the adversities with serenity for this last mission to the hypogeum.



Edited by Nina Earl


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