Frequency
111 Hz
Resonant Chamber
Explore this frequency
Traditional practice
What it is
A 111 Hz sine tone, close to A2 on a piano. It is also a standard tuning-fork pitch, so it can be struck acoustically as well as played digitally.
What users may experience
A warm, buzzing hum that many people feel in the chest and jaw as much as they hear it.
Traditional associations
Associated with ancient stone chambers and widely used in sound-bath and tuning-fork practice. These associations come from tradition and anecdote, not research.
Sound & relaxation
Low, steady tones are easy to breathe along with, which is a well-documented part of relaxation practice.
How to use it
Play as a base layer for 15–30 minutes, seated or lying down. Speakers with real bass reproduce it best.
Suggested session length
10 · 15 · 20 · 30 minutes — listening style: Base layer, speakers or headphones; intensity: gentle.
Safe listening
Very low tones can feel heavy at high volume. Keep it comfortable and stop if you feel pressure in the ears or head.
Pair with
Physical sound properties, human perception, relaxation effects associated with audio, and traditional frequency beliefs are distinct categories and are kept separate above. Nothing here is medical advice. Read the wellness disclaimer