417 Hz (Solfeggio)
417.00 Hz
Nearest note: G♯4, 7 cents above standard tuning
The second of the six Solfeggio tones published by Leonard Horowitz and Joseph Puleo in 1999.
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.
The button plays a plain tone. Start with the volume low.
About this number
417 Hz is the second of the six original Solfeggio tones, published by Leonard Horowitz and Joseph Puleo in 1999. Puleo is credited with deriving the numbers from verse numbers in the Book of Numbers. The syllable names used with the tones come from a medieval hymn. Medieval singers used those syllables to name notes relative to each other, not to fix frequencies.
What is said about it
What is said, not what was measured
Proponents associate this tone with undoing situations, breaking negative patterns and making change easier.
Facts
- Frequency
- 417.00 Hz
- Wavelength in air (20 °C)
- 82.3 cm
- Nearest note
- G♯4, 7 cents above standard tuning
- Kind of statement
- Claimed frequency
- Filed under
- Claimed frequencies
Sources
- Horowitz & Puleo — the Solfeggio tones
The book that introduced the six original Solfeggio tones. Cited as the origin of the claim, not as evidence for it.
Leonard G. Horowitz and Joseph Puleo, Healing Codes for the Biological Apocalypse (Tetrahedron, 1999).
More about the pitch
The same note in every octave
Each step doubles or halves the frequency. Tap one to hear it.
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.