111 Hz (chamber resonance claim)
111.00 Hz
Nearest note: A2, 16 cents above standard tuning
A number often quoted for ancient stone chambers. A 1996 study of six chambers found resonances between 95 and 120 Hz. Two studies of the Hypogeum in Malta reported 114, 68 to 70, 41, 72 and 76 Hz.
How well is this supported?
A claim that has not been established. Evidence is missing, weak, or limited to small studies.
This number is here because people make claims about it. The entry says what is claimed and what has been tested. It is not advice about health.
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About this number
A number often quoted for the resonance of ancient stone chambers. What was measured: a 1996 study of six ancient structures found that they resonate between 95 and 120 Hz. At the Hal Saflieni Hypogeum in Malta, one study reported 114 and 68 to 70 Hz (2015) and another reported 41, 72 and 76 Hz (2017). Neither found 111 Hz.
What is said about it
What is said, not what was measured
Proponents say chanting or sound at 110 to 111 Hz in these chambers changes brain activity. What has been tested: one pilot study of 30 people (2008) played tones at 90, 100, 110, 120 and 130 Hz and reported a shift in activity between the left and right front of the brain at 110 Hz. It did not test 111 Hz.
Facts
- Frequency
- 111.00 Hz
- Wavelength in air (20 °C)
- 3.09 m
- Nearest note
- A2, 16 cents above standard tuning
- Kind of statement
- Claimed frequency
- Filed under
- Claimed frequencies
Sources
- Resonance of ancient chambers
Cited for what was measured and what was tested.
R. G. Jahn, P. Devereux and M. Ibison, Journal of the Acoustical Society of America 99 (1996) 649–658. I. A. Cook, S. K. Pajot and A. F. Leuchter, Time and Mind 1 (2008) 95–104. R. Till, Antiquity 91 (2017) 74–89.
View source: Resonance of ancient chambers - Hal Saflieni Hypogeum, 2015 measurement
Cited for the resonances it reported at the Hypogeum: 114 Hz, and 68 to 70 Hz.
P. Debertolis et al. (2015).
More about the pitch
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Entries close in pitch
Within 35 cents of this tone, in any octave. A cent is one hundredth of the step between two neighboring piano keys. Being close in pitch does not mean two things are connected.