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285 Hz

285 Hz is a single sine tone, one steady pitch between C♯4 and D4, with no harmonics and nothing moving underneath it. It is the middle of the three solfeggio tones on this site — brighter than 174 Hz, darker than 396 Hz. Suits anyone who wants a plain drone to work or meditate against.

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Meditation bell
rings once when you pick one
Fade in
softens the start at night

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Stack this under rain or a fire, keep the blend, and play it with your screen off. Slo, on iOS, Android and Mac.

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What 285 Hz sounds like

One sine wave, 285 Hz, no audible harmonics, the same in both channels, looping without variation. The pitch lands between C♯4 and D4, closer to C♯4, which puts it in the middle of the range where a sustained tone starts to feel present rather than distant. Played quietly it reads as a soft mid-range hum; pushed louder it becomes hard to ignore, which is the usual reason people turn a pure tone down.

What the evidence actually shows

A search of the literature found no systematic review and no clinical guideline addressing solfeggio frequencies at all. This is an absence of evidence rather than a mixed picture: the healing properties attached to these numbers have never been tested at a level that would let anyone repeat them. Describe the tone by its pitch, listen if you enjoy it, and treat any page that promises more as making it up.

Hear the neighbouring pitches on the 174 Hz tone and the 396 Hz tone, or see the full catalogue on the sound library index. To soften the tone, open the 285 Hz and pink noise blend in the free sound mixer, where a broadband bed takes the edge off a pure pitch.

Build a layered soundscape in thefree sound mixer, or try 174 hz , 396 hz or schumann fundamental . You can also read our guide to noise colors.

Frequently asked questions

What musical note is 285 Hz?

It falls between C♯4 (277.18 Hz) and D4 (293.66 Hz) in standard concert tuning, sitting nearer to C♯4.

Is there research supporting 285 Hz?

No. No systematic review or clinical guideline addresses solfeggio frequencies, so there is nothing to support the properties traditionally attached to them.

Why does a pure tone sound louder than noise?

All of its energy sits at one pitch instead of spreading across the spectrum, so it stands out sharply. Lowering the volume usually fixes it.

Does this player have a sleep timer?

Yes. Set it to stop after 15, 30, or 60 minutes, or leave the timer off for continuous playback.