Brown noise vs white noise: which one helps you sleep and focus

All three noises are made of random sound. The difference is where the energy goes. White noise spreads it evenly across every frequency, so to the ear it sounds bright and hissy, like a detuned radio. Pink noise loses energy as the pitch rises, which makes it sound like steady rain. Brown noise tilts even further toward the low end: a deep, soft rumble, closer to a waterfall heard from a distance or the inside of a plane.

Why noise helps at all

Most sounds that wake you up or break your focus are not loud. They are sudden: a door, a voice, a phone in the next room. A steady bed of noise raises the background level, so those changes stand out less. Nothing about noise is magic. It simply hides the contrast your brain reacts to.

Which one to choose

• For sleep, most people prefer pink or brown. White noise can feel harsh after an hour because of all the high frequencies.
• For focus in an open office or a café, brown noise is good at covering voices, since speech lives in the low and middle range.
• For masking high-pitched sounds like a whining fan or tinnitus, white noise does the job best.

If you are not sure, start with brown, listen for ten minutes, then try pink. Your ears will tell you quickly which one you forget about.

What the research says

Studies on noise and attention are small and the results are mixed. Some people, including some with ADHD, report that background noise helps them stay on task; others find it distracting. Treat any noise as a tool to test on yourself, not a treatment.

How loud

Quieter than you think. The noise should sit just above the sounds you want to cover, not on top of everything. If you use it for a baby, keep the speaker away from the crib and the volume low.

Try it here

The noise on Flac.time is generated right in your browser, so it never loops or cuts out, and it works offline once the page has loaded. Set the sleep timer and the sound fades out over thirty seconds before it stops.