Frequency Explorer
Frequencies, explained plainly
432 Hz, 528 Hz, Theta · 6 Hz: these names come up often in sound apps. Each entry here describes the sound, explains whether the number is a pitch you hear or a beat, and labels the evidence behind what people link with it.
Entries
Entries appear here one by one, as soon as their sources have been checked and listed. None is published yet.
Pitch or beat?
Two kinds of number
A number in hertz (Hz) counts vibrations per second. In this library it means one of two things, and they sound very different.
An audible tone
432 Hz or 528 Hz is the pitch you hear: the air vibrates that many times a second. It sounds the same on speakers and headphones.
A beat rate
Theta · 6 Hz is a slow swell, six times a second, between two tones you hear. As a binaural beat it needs stereo headphones; on a speaker it plays as a pulsing tone.
Evidence labels
What the three labels mean
Every entry carries exactly one label. It rates the evidence for what people link with the sound, not the sound itself, and never what a sound will do for you. When we’re unsure, we use the lower label.
- Research Supported
Reviews or several well-run studies agree, and the entry says only what that research found, as modestly as the research does. Few frequency entries qualify.
- Emerging / Mixed
There are studies, but they are small, few, or disagree. Nothing is settled.
- Traditional / Unproven
The idea comes from tradition, music culture or online claims, without reliable evidence. Enjoy it as a sound.
How entries are checked
Each entry lists its sources. An entry goes on this site only after its facts and sources have been checked, so the list grows over time. Everyone hears sound differently, and nothing here is medical advice.