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963 Hz
Free healing-frequency, solfeggio & Om sound generator
The highest tone of the nine-note solfeggio set — pure or softened with a lower layer.
Start at a low volume and turn up slowly. Pure tones can sound louder than music at the same setting, especially higher frequencies.
| Frequency | 963 Hz (963 vibrations per second) |
|---|---|
| Nearest musical note (A=440) | B5 −44 cents |
| Wavelength in air | about 36 cm |
| Period of one cycle | 1.04 ms |
| Solfeggio syllable | — (sometimes "Si") |
| Which set | Extended set (later addition) |
| Popular claim | Promoted as the "crown chakra" or "pineal gland activation" tone and a "frequency of oneness" (a claim, not a demonstrated effect) |
963 Hz was not in Joseph Puleo's original six-tone set, which ended at 852 Hz. It was added later, along with 174 and 285 Hz, and sometimes gets the syllable "Si" (the seventh note added to the old six-syllable system in the 1600s). Its digits are 9, 6 and 3 — the sequence many promoters treat as special, often alongside a quotation about "3, 6 and 9" that is attributed to Nikola Tesla but has no reliable source.
963 Hz is widely sold as the "crown chakra" frequency, the "frequency of the gods", or a tone that "activates the pineal gland". There is no evidence for any of this. The pineal gland's best-understood job is releasing melatonin in response to light and darkness; it is not stimulated by audible tones. And pairing chakras with Hertz values is a modern idea, not part of traditional yoga.
That does not stop 963 Hz from being a pleasant, bright tone for a short contemplative session, if you enjoy it. Just enjoy it for what it is.
963 Hz lies between A#5 (932.33 Hz) and B5 (987.77 Hz), about 44 cents below B5. For comparison, the octave above 432 Hz is 864 Hz, so 963 Hz is higher still — near the top of the range most people can comfortably sing.
Nobody has shown that a particular frequency heals the body, repairs DNA or treats a medical condition. The specific benefits attached to each solfeggio number are claims from the books and videos that popularised them, not findings from controlled research. What is well supported is more modest: calm, steady, predictable sound that you like can help you relax, mask distracting noise and give your attention somewhere to rest. Any of these tones can do that — and so can plenty of others.
Use it for: relaxation, meditation, a calm background while you read or rest, sound exploration, or simply because you like it. Don't use it as: a treatment for any medical or mental-health condition. For a deeper look at the whole set, see the solfeggio frequency list.
No. There is no evidence that any sound activates the pineal gland. The gland responds mainly to light and darkness through melatonin release.
No. The original set was six tones from 396 to 852 Hz. 963 Hz was added later as part of the extended nine-tone set.
It sits between A#5 and B5, about 44 cents below B5.
Most people find a high tone too bright for sleep. If you want to try, use the soft drone at a very low volume and set the sleep timer.