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852Hz
852 Hz is one steady tone, bright and bare, the same in both ears. Like the 639 Hz pitch it sits between two notes rather than on one, so it will not blend with tuned music. It is the second highest tone on this site and the second most demanding on the volume control.
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.
Bright, bare and between notes
The pitch falls between G sharp 5 and A5, near enough the middle that it beats against either neighbour instead of blending with it. On its own that does not matter. Alongside anything at concert pitch it does. The file holds one frequency and nothing else: no harmonics, no backing, no drift across the loop.
Up here a pure tone carries across a room at a setting that feels almost silent beside the speaker. Choose the level while sitting where you intend to sit, not while leaning towards the device.
On spiritual order and third eyes
The usual claim for 852 Hz is a return to spiritual order or an awakened intuition. Neither of those is something anyone can measure, so there is nothing here that could be tested, let alone tested and confirmed. No systematic review or clinical guideline covers solfeggio frequencies. The numbers date to a 1970s numerological reading of the Book of Numbers, not to any older musical tradition.
For a lower and gentler pitch try the 174 Hz tone, and for one that lands squarely on a real note try the 396 Hz tone. The 852 Hz and rain blend in the free sound mixer keeps the tone present without leaving it exposed.
Frequently asked questions
What note is 852 Hz?
None exactly. It falls close to halfway between G sharp 5 and A5, in a gap standard tuning has no name for.
Does 852 Hz open the third eye?
That is not a claim anyone can measure, and nothing in the research literature addresses solfeggio frequencies. The honest description is a bright pure tone.
Why does it sound louder than the lower tones?
The ear is considerably more sensitive around this pitch than it is down at 174 or 285 Hz, so the same fader setting reads as much louder.
Is it identical in both ears?
Yes. Both channels carry the same signal, so headphones and speakers give you the same tone.