Focus Soundscape Generator

Brown noise is the deepest of the noise colours — energy concentrated in the low frequencies, like a distant waterfall or heavy rain. It's the most popular focus sound because it masks intermittent distractions (voices, doors, notifications) without the harsh hiss of white noise. Many people with ADHD report it helps them settle.

Pink noise sits between brown and white — balanced energy across octaves, close to the spectral profile of rainfall and wind. It's gentler than white noise and has been studied for its effects on sleep and sustained attention.

White noise has equal energy at every frequency, producing a brighter hiss. It's the most aggressive masker, useful in genuinely loud environments, but fatiguing for long stretches.

The rain, ocean, and drone layers are textures built on top of these. Rain is filtered noise; ocean is brown noise gently rising and falling on a slow swell; the drone is a set of detuned low tones for a meditative pad. Layer them to taste — many people find brown noise plus a faint ocean swell is the sweet spot for deep work.

How it's made

Nothing here is a recording. Every sound is generated in real time by the Web Audio API — noise is computed sample-by-sample (brown noise is a smoothed random walk; pink noise uses Paul Kellet's filter), and the textures are shaped with filters and low-frequency oscillators. That means no files to download, no streaming, no data leaving your device, and a soundscape that never loops audibly because it's never the same twice.

On volume and your ears

Masking sound works best quiet — just loud enough to blur distractions, not so loud that the sound itself becomes the distraction. If you can still hear a conversation but can't make out the words, you've found the right level. Take breaks; prolonged exposure to any sound at high volume is worth avoiding.