Noise Generator
Continuous background noise for focus, sleep, or masking sound — keeps playing while you use other tabs.
Last updated
About the different noise colors
White noise has equal energy at every frequency — it sounds like TV static or a hiss, and is good at masking sudden, varied sounds. Pink noise reduces higher frequencies (power falls off at 3 dB per octave), sounding softer and closer to steady rain or wind. Brown noise (technically "red noise") falls off even faster (6 dB per octave), producing a deep, low rumble like a waterfall or distant thunder — often preferred for sleep since it has less high-frequency hiss. Blue noise is pink noise's mirror image, rising 3 dB per octave for a brighter, airier hiss; violet noise (also called purple noise) rises even faster at 6 dB per octave for a sharp, almost sizzling hiss — sometimes used to mask high-pitched tinnitus.
Sound is generated live with the Web Audio API from random values, not a looped audio file, so it never audibly repeats. It fades in and out over about half a second to avoid a click, and keeps playing as long as this tab stays open, even if you switch to another tab — closing the tab or navigating away stops it. The optional sleep timer fades it out and stops it automatically after the chosen time. Nothing is recorded or uploaded.