Green noise
Green noise concentrates its energy in the middle of the audible range, around 500 Hz. It is often described as the "background noise of the world": calm, airy and neither boomy nor hissy.
- Spectrum
- Band-shaped: peak near 500 Hz, rolled off above and below
- Good for
- Relaxing without deep bass or high hiss
- People who find brown noise muffled and white noise sharp
- Reading and light focus
Loading the player… it needs JavaScript to generate sound.
What is green noise?
Unlike white, pink and brown, green noise has no formal scientific definition. The most common meaning is noise filtered to the middle of the spectrum, so it keeps the natural "wash" of a waterfall or wind without the rumble or the fizz. On the dial it appears as a single hump centred around 500 Hz.
Our version is wideband noise shaped by a smooth bell curve about two octaves wide, with a faint tail so it never sounds like a narrow tone.
Is green noise good for sleep?
Green noise became popular online in 2023 as an alternative sleep sound. There is no research on it specifically, but it works on the same principle as other noise: a steady sound that makes sudden changes less noticeable. If you like its gentle middle, it is a fine choice.
Questions
What does green noise sound like?
Like a distant waterfall or wind through trees: a soft, even hush focused on the middle frequencies.
Is green noise real?
It is a popular label rather than a scientific standard. Here it means noise with most energy in a band around 500 Hz.
Green noise vs pink noise?
Pink noise spans all octaves equally; green noise emphasises the mid-range and cuts deep bass and bright treble.