Ambient Noise Generator
Browser-generated white, brown and pink noise for focus, sleep and relaxation. No files downloaded.
Select a noise type and press play
60%
Auto-stop:
Off
15 min
25 min
45 min
1 hr
2 hr
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Frequently Asked Questions
White noise has equal energy at every frequency — like TV static. It's bright and somewhat harsh. Pink noise has equal energy per octave (power decreases by 3dB/octave) — it sounds warmer and is found in nature (rain, wind). Brown noise (also called red noise) decreases by 6dB/octave — the deepest, most rumbling sound. Many people find brown noise best for sleep and focus.
Research suggests moderate ambient noise (~70dB) can enhance creative cognition by inducing a mild level of distraction. White/pink/brown noise masks distracting conversations and sudden sounds (the "cocktail party effect"). A 2012 study in the Journal of Consumer Research found ~70dB to be the sweet spot — too quiet and too loud both hurt performance.
All sounds are synthesized in real-time using the Web Audio API. White noise is generated by a ScriptProcessorNode filling a buffer with random values. Pink noise uses Voss-McCartney algorithm. Brown noise integrates white noise. Binaural tones use two OscillatorNodes with slightly different frequencies. No data is downloaded — it's pure math.