136.1 Hz is worked out from the length of the Earth's year around the sun, moved up into hearing range. Many singing bowls and gongs are tuned close to it. It sits low and steady, which is why people like to hum along.
traditionally linked with
how listeners use it
Frequency music is for relaxing, focusing and enjoying sound. The meanings above come from tradition and from how listeners describe it. They are not medical claims, and the music does not replace care from a doctor or therapist.