Green Noise Generator
Calm, midrange green noise that plays without gaps or ads. Press play, then use the ten faders to make it fuller or airier. It keeps going with your screen locked.
What is green noise?
Green noise is noise with most of its energy in the middle of the range you can hear, around 500 Hz, and less in the deep bass and the high treble. People often say it sounds like a waterfall, a steady breeze or distant surf.
Unlike white, pink and brown noise, green noise has no formal definition. White noise is flat, pink falls 3 dB per octave and brown falls 6 dB per octave, and engineers agree on those. "Green" is a newer, informal name, so two green noise generators can sound a little different.
The Green preset here peaks at the 500 Hz fader and slopes down on both sides. Compared with pink noise, it has less rumble and less hiss, so it sits in the middle of the room instead of filling it.
Shaping your green noise
For a bigger waterfall, raise the 125 and 250 faders a few steps. That adds weight without turning it into a rumble.
For more of a breeze, raise the 2k and 4k faders slightly. Go easy on 8k and 16k, since that's where hiss comes from.
Turn on Drift and each band slowly swells and fades, which makes it sound more like moving water or wind than a machine.
Why people use it
Many people find green noise easy to ignore. It covers conversation and household sounds, which sit mostly in the midrange, without the high hiss of white noise or the heavy low end of brown noise.
There's no research on green noise specifically. Studies on sleep and focus have looked at white and pink noise, and their results are mixed. Treat green noise as a pleasant way to cover sound, and choose it if you like how it sounds.
Questions
Is green noise real?
It's a real sound, but not a standard term. Scientists and audio engineers define white, pink and brown noise precisely. "Green noise" is an informal name for noise centered on the midrange, so what you hear depends on the generator.
What's the difference between green, pink and brown noise?
Pink and brown noise put the most energy in the bass and get quieter as the pitch rises, brown more steeply than pink. Green noise is quieter at both ends and loudest in the middle. Tap the Pink and Brown presets above to compare them at the same loudness.
Is green noise good for sleep?
If you like the sound, it can cover noises that would otherwise wake you. No studies have tested green noise for sleep. Keep the volume low, and use the sleep timer if you'd rather it fade out after you fall asleep.
Does it loop or have gaps?
No. Your browser generates the noise live instead of playing a recording, so you won't hear a gap or seam where a track starts over.
Does it keep playing when I lock my phone?
Yes. It plays like a music track, so it keeps going with the screen locked and you can pause it from the lock screen. The built-in browser inside some apps may still stop it. If that happens, open this page in Safari or Chrome.