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963Hz
963 Hz is the highest tone on this site: one clear, bright pitch, the same in both ears, holding steady with nothing behind it. It sits in the region where human hearing is at its most sensitive, so it will sound louder than anything else here at the same fader setting. Start the volume very low.
Ready to play
Stack this under rain or a fire, keep the blend, and play it with your screen off. Slo, on iOS, Android and Mac.
The highest tone here, and the loudest for its setting
It falls between A sharp 5 and B5, roughly a quarter-tone from each, so no note quite names it. The file carries one frequency and nothing else audible.
Near a kilohertz the ear is far more sensitive than it is at the bottom of the solfeggio set, so this tone and the 174 Hz tone played at the same fader position will not sound remotely alike in loudness. Long sessions with a bright pure tone tire most listeners, which is the usual reason people turn one down or switch it off.
Crown chakras and pineal glands
This is the number attached to the crown chakra and to activating the pineal gland. The pineal gland secretes melatonin on a light-driven cycle and has no known response to airborne sound at any frequency. No systematic review or clinical guideline addresses solfeggio frequencies, and the set itself was assembled in the 1970s from a numerological reading of the Book of Numbers.
What is left after all that is a clean, high, steady pitch, which some listeners genuinely like. Compare it against the 396 Hz tone and the 285 Hz tone, or find every player on the sound library index. To take the edge off, use the 963 Hz and brown noise blend in the free sound mixer.
Frequently asked questions
What note is 963 Hz?
None exactly. It sits near the midpoint between A sharp 5 and B5, so it belongs to no scale.
Does 963 Hz activate the pineal gland?
No. The pineal gland responds to light, not to airborne sound, and no research addresses solfeggio frequencies in the first place.
Why does this tone feel piercing?
Hearing is at its most sensitive near a kilohertz, and everything in this file sits at one pitch inside that region. Lowering the volume fixes it.
Is the file genuinely 963 Hz?
Yes. The pitch measures 963.0 Hz with nothing else audible alongside it, which is more than many sites selling this number manage.