Audio Licensing

No audio files are streamed or downloaded

All audio on whitenoiseforsleeping.com is generated live in your browser using the Web Audio API. The generator uses algorithmic synthesis to produce white, pink, brown, violet, and grey noise in real time:

• White noise: Uniform random numbers in [-1, 1], generating flat power spectral density.
• Pink noise: Voss-McCartney algorithm (16-octave random walk summation), producing 1/f spectral density (-3 dB/octave).
• Brown noise: Integrated white noise (Brownian motion process), producing 1/f squared spectral density (-6 dB/octave).
• Violet noise: Differentiated white noise, producing increasing spectral density with frequency (+6 dB/octave).
• Grey noise: White noise shaped by an A-weighting approximation for perceptually flat response.

Because the audio is generated algorithmically, there are no source recordings. No audio content licences are required. No third-party audio assets are used.

Advantages of synthesis over recorded loops

• Perfect infinite loop: There is no loop point. The noise is mathematically random at every sample, so the sound is genuinely continuous with no discernible repeating pattern.
• Zero audio bandwidth: After the JavaScript is cached on your first visit, no audio data is ever downloaded. The generator runs entirely within the browser.
• Instant colour switching: Switching between white, pink, brown, violet, and grey noise is instantaneous. No crossfade loading delay.
• Live spectrum visualisation: The AnalyserNode reads the generated audio in real time, so the spectrum display reflects the actual noise being generated at each moment.

Future recorded variants

A future version of the site may offer recorded real-world variants as supplementary layers: fan sounds, HVAC, hairdryer. If these are added, they will use CC0-licensed source recordings from sources such as Freesound.org, with full attribution listed here. The current version (v1, April 2026) does not include any recorded audio.

Site licence

The noise-generation algorithms used (Voss-McCartney pink noise, Brownian integration) are well-known public domain methods implemented in JavaScript. The Web Audio API is an open W3C standard. The implementation on this site is copyright Digital Signet 2026.