111 Hz frequency
111 Hz is a low tone, a little below A2 on a piano, that circulates in sound-healing playlists as the “holy frequency”. It is often linked to research on ancient stone chambers such as Newgrange in Ireland and the Hypogeum of Ħal Saflieni in Malta.
- Nearest noteA2 +16¢
- Period9.01 ms
- Wavelength in air3.09 m
Like all low tones, 111 Hz needs headphones or a speaker with real bass. On a phone speaker you’ll mainly hear its overtones.
What 111 Hz is claimed to do
- Said to promote cell regeneration and “beta-endorphin” release
- Linked to the acoustics of Neolithic chambers
- Used as a deep, meditative drone
What the evidence says
Acoustic surveys (for example Jahn, Devereux and Ibison, 1996, in the Journal of the Acoustical Society of America) found that several ancient chambers resonate somewhere around 95–120 Hz, which a low male voice can excite. That is an interesting finding about architecture. The claims about cells and endorphins have no published support.
111 Hz: common questions
What is 111 Hz good for?
It is promoted for cell regeneration and calm. There’s no evidence for the cellular claims; as a deep drone it can be a pleasant meditation backdrop.
Why is 111 Hz called the holy frequency?
Because of studies showing some ancient chambers resonate around this range, which enthusiasts connect to ritual chanting. The researchers themselves didn’t make health claims.
What note is 111 Hz?
Just below A2 (110 Hz), about 16 cents sharp of it.