Tuning Fork — C128 (Otto Fork)
Directly measured, standardized, or well-supported in mainstream scientific or technical literature.
This entry describes an instrument or resonance reference. Therapeutic outcomes depend on context, level, instrument build, and listener response.
Review the evidence modelThe 128 Hz "Otto" tuning fork (C3) is widely used in sound healing, placed directly on the body. Also used medically in bone conduction hearing tests. C128 = 2^7 Hz.
Sources
Historical, cultural, and practitioner sources used to document how frequencies are talked about in practice communities.
Traditional and practitioner sound-healing sources.
Historical Use
Used in sound healing placed on the body (Otto tuner). Also used in medical bone conduction tests.
Octave Ladder
Every audible octave of this frequency — the same tone, higher and lower.
Nearby in the Atlas
Entries within ±35 cents of this tone when reduced to the same octave — candidates for pairing or comparison.