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432 Hz tone generator
General information, not medical advice. Talk to a doctor about any health concern. Keep the volume low, especially for long sessions or sleep. Disclaimer
Press Begin to hear a pure 432 Hz sine tone. Choose Compare to switch between 432 and 440 Hz every four seconds and hear the difference for yourself. 432 Hz is the note A tuned about a third of a semitone lower than the modern standard of 440 Hz.
Many people find it a little warmer. There's no good evidence that it does anything special for health, and we explain why in 432 Hz: the real story.
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Listen kindly. Keep the volume low, especially for long sessions or sleep. Start quiet and raise it slowly. Pure tones carry more than you'd expect, and long sessions at high volume can tire your ears.
What you're hearing
- Pure sine: exactly one frequency, with no overtones. It sounds plain, a little like a tuning fork.
- Warm: adds a quiet octave below (216 Hz for a 432 tone), which makes it rounder and easier to sit with.
- Background: a soft drone tuned to the same note, or pink or brown noise.
- Strike the bowl: rings a singing bowl tuned an octave below your tone.
432 versus 440, in one paragraph
Tuning pitch wasn't fixed for most of music history: the A that orchestras tuned to wandered from town to town and from century to century. France set A = 435 in 1859; A = 440 became the international standard in the 20th century (ISO 16). 432 Hz is close to some older tunings, and Verdi argued for a pitch near it. The claims that 432 Hz matches "the frequency of the universe" or the body are folklore. Our 432 Hz guide tells the whole story with sources.
Questions
Can I hear the difference between 432 and 440 Hz?
Side by side, most people can hear that 432 is a little lower; that's what the Compare button is for. Heard on its own, hours apart, it's very hard to tell for anyone without perfect pitch.
Is 432 Hz better for you?
There's no good evidence that it is. A few small studies report slightly calmer measurements with 432 Hz music, but they're small and often poorly controlled. Liking the sound is reason enough.
Can I play other frequencies?
Yes: use the slider for anything from 100 to 1,000 Hz, or the 528 Hz button. For binaural beats use the binaural beats generator; for noise and pulses, The Instrument.
Can I link straight to a frequency?
Yes. Add ?hz= and a number to the address, for example ?hz=528.