Sound Machine

Choose a color or scene, set a fade timer, and drift. Everything synthesized in your browser — no audio files, no tracking.

Volume 40% Fade out

Pick a sound and press play.

How to use this

Brown noise is the most-loved for sleep — most people find it the least fatiguing over long sessions.
Volume should be a touch louder than the noises you're masking, but no louder. Above 50 dB and you'll wake up tired.
Set a 30-minute fade if your brain has already learned to associate quiet with awake. Two weeks of this resets the link.