Generate white, pink, and brown noise for focus, sleep, and sound masking.
This tool synthesizes noise in real time in your browser and plays it back as a continuous, non-looping stream in white, pink, or brown flavors, each with a different frequency balance. You pick a color and a volume, and it runs for as long as the tab stays open and active. What catches people off guard: the three colors are not equal-loudness. White noise carries more high-frequency energy, so pink and brown noise can sound noticeably quieter or duller at the same volume slider position, which reads as a broken control when it is really just a different spectral shape.
White noise is produced from independent random values on every sample, giving roughly equal energy at every audible frequency. Pink noise filters that signal so energy falls off by about 3 dB per octave, weighting it toward lower frequencies. Brown (red) noise integrates the random signal further, a random-walk process, so energy falls off by about 6 dB per octave, producing a deeper, rumbling sound with almost no high-frequency content.
Samples are computed on the fly in the browser's audio engine rather than played from a recorded file, so there is no audio to download or stream and no fixed loop length to listen for a seam in. Volume is applied as a gain stage on top of the generated signal. Because generation depends on the tab running, playback can be interrupted if the device sleeps or the browser suspends background tabs.
No. It is a different frequency balance, not a volume change. White noise has flat energy across all audible frequencies. Pink noise's energy falls off by about 3 dB per octave, favoring lows and mids. Brown noise falls off faster, about 6 dB per octave, so it sounds deeper and more muffled than either.
No data is streamed or downloaded since the noise is generated locally by your browser's audio engine. Any battery drain comes from your CPU continuously generating samples and from keeping the screen or tab active, not from network use.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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