Brown Noise
Generated right in your browser — nothing to download or install. Set a stop timer for sleep, or leave it running while you work.
Brown Noise — Free Online Brown Noise Generator
Press play above for free, continuous brown noise — a deep, smooth rumble generated live in your browser. Set the volume, add a stop timer for sleep, or keep it running while you work. No app, no account, no ads.
What Is Brown Noise?
Brown noise (sometimes called red or Brownian noise) is named after Brownian motion — the random movement described by botanist Robert Brown — not the colour. Its energy drops off steeply at higher frequencies, so it sounds much deeper than white noise: more like a waterfall, heavy rain on a roof or the low roar inside a plane cabin.
Why People Like It
- Focus — brown noise became popular online, particularly among people with ADHD, who describe it as quieting mental chatter. Formal research on brown noise specifically is still limited, so treat it as a personal-preference tool: try it for a few sessions and see how you work.
- Sleep — its low, even rumble masks traffic and household noise without the hiss some people find irritating in white noise.
- Calm — a steady background sound can make a busy environment feel more contained.
Brown Noise + a Timer
Background sound works best with structure. Put brown noise on, then start a 25-minute Pomodoro timer in another tab — or use our free Focus app, which has brown noise, rain and café sounds built in alongside the timer.
Compare the Colours
Want something a little brighter? Pink noise sits between brown and white noise. Switch between them any time with the Colour buttons above.
Listening Safely
Keep the volume comfortable and as low as still works for you, especially with headphones or when listening for hours. Long, loud listening can damage hearing.
Brown Noise — FAQ
Does brown noise help with ADHD?
Many people with ADHD report that brown noise helps them focus, but scientific research on brown noise specifically is limited. It's safe to try at a comfortable volume and see whether it works for you.
What's the difference between brown and white noise?
White noise has equal energy across all frequencies and sounds like a hiss. Brown noise has much less high-frequency energy, so it sounds like a deep rumble.
Can I use it all night?
Yes — pick the 8 hr stop time and it fades out at the end. Some phones pause web audio when the screen locks, so a computer or plugged-in device works best overnight.