NeverloopWhat green noise is
White, pink and brown noise have textbook definitions: they differ in how fast their energy falls as the pitch rises. Green noise does not. It is an informal name for noise whose energy gathers in the middle of the range, roughly around 500 Hz, with less in the deep lows and the bright highs. People often describe it as the sound of nature: a waterfall, a river, wind in a forest.
Here it is made from pink noise with the lows under about 150 Hz and the highs above about 2 kHz taken away. What is left is a full, soft wash with no rumble and no hiss.
Green, pink, brown and white
- White: equal energy per frequency. Bright and hissy.
- Pink: equal energy per octave. Balanced, like steady rain.
- Brown: tilted further to the lows. A deep rumble.
- Green: the middle of pink, without its lowest lows and highest highs. Like a waterfall.
All four are one tap away above, at the same loudness, so you can compare them fairly. The pink noise and brown noise pages say more about those two.
Generated, not recorded
Most green noise online is a recording: an hour of audio, or a few minutes on a loop. Here the noise is computed as it plays, so there is no seam to find, however long it runs.
The controls
- Colour: green, pink, brown or white.
- Tone: a filter from dark and muffled to fully open.
- With music: slow chords from Neverloop's Deep Work under the noise, composed live as well.
Questions
- What is the difference between green and pink noise?
- Pink noise covers the whole range, with equal energy in every octave. Green noise keeps the middle of it and turns down the lowest lows and the highest highs, so it sounds softer at both ends, more like water than rain.
- Is green noise a real noise colour?
- It is not a standard term in acoustics like white or pink noise. The name is used for noise centred in the mids, around 500 Hz, and that is what this page plays.
- What do people use green noise for?
- Mostly to cover other sounds while they work, read or rest. We make no claims about sleep or the brain: try it, and keep it if it suits you.
Neverloop for Mac
The same music in an app: plays in the background and with the screen locked, works offline, and adds Lo-fi Desk without a break, focus cycles you build yourself, a breathing mode with a pacer, and saved variations.