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Originally posted by SpookyVince
but I believe that you cannot restrain that reasoning to "sound" only, but to vibrations, waves.
The ICRL team appear as if they might be on the brink of scientifically linking the 110 Hz primary resonance band with effects on the brain: current experiments are showing that the specific frequency range around 110 Hz tends to stimulate a certain electrical brain rhythm associated with particular trance-like states.
An effectively random selection of megalithic chambered sites in England and Ireland were tested for their natural (primary) resonant frequencies, with only the great chambered passage-mound of Newgrange in Ireland being pre-selected due to the need for special permission. The findings surprised the ICRL researchers: all the investigated chambers were found to have a natural primary resonance frequency in the 95-120 Hertz band, with most at 110-112 Hz – this despite variations in sizes and shapes of the chambers. There was even some evidence of “retro-fitting”, as if internal features within the chambers had been placed to “tune” the natural resonance to the required frequency. The great chamber of Newgrange resonates effectively at 110 Hz, and the 19m (62-foot) passage behaves like a wind instrument, with sound waves generated within the chamber filling it, their amplitude decreasing towards the entrance.
In subsequent OTSF testing, stone rooms in ancient temples in Malta were found to match the same pattern of resonance, registering at the frequency of 110 or 111 hz. This turns out to be a significant level [right] for the human brain. Whether it was deliberate or not, the people who spent time in such an environment were exposing themselves to vibrations that impacted their minds.
Findings indicated that at 110 hz the patterns of activity over the prefrontal cortex abruptly shifted, resulting in a relative deactivation of the language center and a temporary switching from left to right-sided dominance related to emotional processing. People regularly exposed to resonant sound in the frequency of 110 or 111 hz would have been "turning on" an area of the brain that bio-behavioral scientists believe relates to mood, empathy and social behavior.
A recent study [2] evaluated the possibility that tones at these frequencies might specifically affect regional brain activity. In a pilot project, 30 healthy adults listened to tones at 90, 100, 110, 120, and 130 Hz while brain activity was monitored with electroencephalography (EEG). Activity in the left temporal region was found to be significantly lower at 110 Hz than at other frequencies. Additionally, the pattern of asymmetric activity over the prefrontal cortex shifted from one of higher activity on the left at most frequencies to rightsided dominance at 110 Hz.
These findings are compatible with relative deactivation of language centers and a shift in prefrontal activity that may be related to emotional processing. (see Left Brain:Right Brain by Dan Eden). These intriguing pilot findings suggest that the acoustic properties of ancient structures may influence human brain function, and suggest that chanting might have been used to enhance right brain activities.
“Correct teachings find all their principles in musical tones. When the tones are correct, men’s conduct is correct. Sounds and music are what agitates and stirs arteries and veins; what circulates through the life-essences and gives to the heart harmony and rectitude.
Thus the note ‘kong’ moves the spleen and brings man in harmony with perfect holiness; the note ‘chang’ moves the lungs and brings man in harmony with perfect justice; the note ‘kio’ moves the liver and brings man in harmony with perfect goodness; the note ‘tche’
moves the heart and brings man in harmony with perfect rites; the note ‘yu’
moves the kidneys and brings man in harmony with perfect wisdom.”
‘The Historical Memoirs of Su-Ma-Tsien’, 100 B.C. from
‘The magic of Tone and the Art of Music’ by Dane Rudhyar
Originally posted by SpookyVince
reply to post by whitewave
A wave actually "dissipates".
Compared to a reflective surface, which will cause most of the energy to be reflected off at an angle equal to the angle of incidence, a diffusor will cause the sound energy to be radiated in many directions, hence leading to a more diffusive acoustic space. It is also important that a diffusor spreads reflections in time as well as spatially. Diffusors can aid sound diffusion, but this is not why they are used in many cases; they are more often used to remove coloration and echoes.