TempoLife › Features › White, pink and brown noise generator
Noise generator
White, pink and brown noise generated live in your browser, with a volume slider and a sleep timer. Nothing downloads, nothing streams — the sound is computed on your device.
The sound on this page is synthesised in your browser — there are no recordings and nothing streams. The volume default is low; your ears are yours.
The colours, exactly
White: every frequency carries equal energy. Pink: energy falls 3 dB per octave, matching how human hearing perceives loudness across frequencies. Brown: 6 dB per octave, dominated by low frequencies. The generator builds the samples with the standard filter recipes — pink via the Paul Kellet filter, brown as integrated white noise.
Source: Audio synthesis recipes: P. Kellet's pink-noise filter (public domain technique); Web Audio API specification · checked 2026-09-03
Frequently asked questions
What is the difference between the colours?
White noise has equal energy per frequency and sounds like static. Pink noise drops 3 dB per octave — deeper, closer to rain. Brown noise drops 6 dB per octave — a low rumble like distant surf. "Colour" is just the slope of the spectrum.
Is there science behind noise for sleep?
Some small studies suggest steady background noise can help people fall asleep faster in noisy environments and mask disruptive sounds. The evidence is modest — what is certain is that it masks the neighbour's bass.
Why does this page generate the sound instead of playing files?
Because synthesised noise is honest: the exact spectrum is computed on your device, nothing is compressed, and there is no audio library to licence or fake. The page says it plainly.
Wind down on a schedule
TempoLife pairs the noise with a wind-down routine and a sleep log — the habit, not just the sound.