Blue Noise Generator
Bright, crisp blue noise that plays without gaps or ads. Press play, then use the ten faders to soften or sharpen it. It keeps going with your screen locked.
What is blue noise?
Blue noise is the opposite of pink noise. Its energy rises by 3 dB for every octave you go up, so the treble dominates and the bass nearly disappears. It sounds like a hiss or a spray of water, sharper than white noise.
Violet noise goes further, rising 6 dB per octave, the mirror image of brown noise. You'll find both among the presets above.
The Blue preset sets that slope across the ten octave faders, with 16k the loudest and 31 Hz almost silent.
Shaping your blue noise
Blue noise can get piercing. If it's too sharp, lower the 8k and 16k faders a few steps, or use Level − to turn everything down.
For a fuller sound, raise the 250 Hz to 1k faders slightly. That keeps the brightness but gives it some body.
Where blue noise is used
Blue noise matters more in technology than in bedrooms. In graphics and printing, patterns based on blue noise spread dots evenly without visible clumps. In audio, noise shaped toward the high frequencies is used when reducing bit depth, pushing unavoidable noise up where it's less noticeable.
As something to listen to, it's a niche choice. Some people like its crisp sound for covering high-pitched noises or for staying alert. Most people find pink, brown or grey noise more relaxing, especially for sleep.
Questions
What's the difference between blue and white noise?
White noise has equal energy at every frequency. Blue noise has more energy the higher you go, so it sounds brighter and thinner.
Is blue noise good for sleep?
For most people, no. Its high hiss is harder to ignore than lower-pitched noise. If you want something to sleep to, try the Pink, Brown or Grey presets above.
Is blue noise safe to listen to?
Yes, at a comfortable volume. Because high frequencies can sound harsh, keep it lower than you would other noise and take breaks if your ears feel tired.
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.