285 Hz (Solfeggio)
285.00 Hz
Nearest note: C♯4, 48 cents above standard tuning
A later addition to the six Solfeggio tones published in 1999. This site could not trace who added it.
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
285 Hz is a later addition to the Solfeggio set. The six original tones were published by Leonard Horowitz and Joseph Puleo in 1999; 285 Hz was not one of them. Who added it, and when, could not be traced.
What is said about it
What is said, not what was measured
Proponents associate this tone with healing of tissues and with repairing “energy fields”. This site found no published study of this tone on its own. One randomized trial in 120 children used music built on 174, 285, 396 and 528 Hz together during allergy skin testing. It was completed in 2025 and had posted no results when this entry was checked.
Facts
- Frequency
- 285.00 Hz
- Wavelength in air (20 °C)
- 1.20 m
- Nearest note
- C♯4, 48 cents above standard tuning
- Kind of statement
- Claimed frequency
- Filed under
- Claimed frequencies
Sources
- Later additions to the Solfeggio set
No originating publication was found for 174, 285 and 963 Hz.
- A registered trial of music built on 174, 285, 396 and 528 Hz
A randomized trial in 120 children. The record says it is completed. No results were posted when this site checked, on September 27, 2026.
ClinicalTrials.gov, NCT07013669.
View source: A registered trial of music built on 174, 285, 396 and 528 Hz
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.