- Green noise = mid-spectrum energy (~500 Hz): the frequency band of rainfall, rivers and surf
- Benefit 1 — masking without hiss: covers doors, voices and traffic while sparing the fatiguing treble of white noise
- Benefit 2 — natural familiarity: brains read rain-like sound as safety, which speeds the settle
- Benefit 3 — all-night comfort: less listening fatigue than white, more presence than brown
- It's a masking and relaxation tool, not medicine — and you can run it free in our browser generator
What Is Green Noise?
Green noise is broadband noise with its energy concentrated in the middle of the audible spectrum, centered near 500 Hz. That band happens to be where nature's steadiest sounds live — rainfall, rivers, leaves, distant surf — which is why green noise sounds less like static and more like weather.
The Benefits
1. Masking without the hiss. Like every noise color, green works by masking change — the door, the snore, the 3 a.m. motorcycle. Unlike white noise, it does the job without pouring energy into the high treble, the region ears find fatiguing over hours.
2. It reads as safety. Brains categorize sound fast, and steady rain has meant 'nothing happening, stay in shelter' for as long as there have been humans. That familiarity is a head start white noise doesn't get.
3. Comfortable at whisper volume, all night. Green sits in the ear's most sensitive band, so gentle levels are plenty — and gentle levels are exactly where masking should run.
4. A kind focus floor. The same properties make green noise a pleasant work backdrop when silence is too silent and music is too interesting.
Green vs Brown vs White
Brown is deeper (rumble — best for racing minds and low-frequency disturbances), white is brighter (maximum masking, most fatigue), and green sits between — the compromise that doesn't feel like one. Full map in our colors of noise guide.
Try It Free — Tonight
Our green noise generator runs in the browser with an 8-hour timer — plus brown, pink, white and blue one tap away. Keep the volume just above a whisper. If you want music rather than pure noise, the sleep playlist below is composed at 432 Hz for the same purpose: a steady floor the night can rest on.
Frequency music supports rest and wellbeing — it is not medical treatment. For ongoing health concerns, please talk to a healthcare professional.
Frequently Asked Questions
Is green noise good for sleep?
For many sleepers, yes — it masks the sound changes that cause wake-ups, at a comfortable timbre that's easy to leave on all night. Evidence for noise-for-sleep overall is mixed and individual; the 30-second ear test settles it faster than any study.
Is green noise bad for you?
No — at sensible volume it's as safe as the sound of rain. The one rule: keep it at masking level (just above a whisper), especially with earbuds, and give your ears silent hours in the day.
What does green noise sound like?
Steady rainfall or a distant waterfall — broadband, but centered where rain lives. Press play on the generator and you'll recognize it in one second.
