White noise spreads energy evenly across frequencies, which gives it a broad, bright hiss. It is different from the deeper rumble of brown noise and the softer balance of pink noise. A continuous hiss can make intermittent background sounds less noticeable, but some people find the hiss itself more annoying than the room around them.
Our research notes describe a 2024 review of thirteen studies on white or pink noise and attention. Twelve used white noise. The pooled results showed a small benefit for people with ADHD or attention difficulties, but a small negative effect for people without them. Participants were mostly children, and the studies measured laboratory tasks. They do not establish that white noise helps every adult study or work.
The player selects recordings identified as white noise when the library contains them. We do not relabel pink noise, brown noise, rain, or a general ambient track as white noise just to fill this page. If none is available, the matching list says so. When trying a recording, keep it quiet enough to be comfortable and compare it with silence. Sleep claims deserve the same caution: continuous-noise research is mixed and very low quality. Visit our research page for the original sources and limits.
What the research says: sources and caveats