Mix brown, pink or white noise with rain, waves, forest and fire sounds to your own taste. For focus, sleep or rest; no sign-up.
The Sound Mixer is a simple mixer that combines three coloured noises generated live in your browser (white, pink and brown) with nature recordings. You set each layer's volume separately; start from a preset, build your own mix and share it with a link. White noise carries equal energy across all frequencies and sounds the brightest; pink noise softens the highs; brown noise is a deep rumble, like a distant waterfall.
Many people use brown or pink noise to cover distracting sounds while they work: in an open-plan office, a café or a busy home. Masking traffic or neighbours while falling asleep, creating a steady background in a baby's room and softening the outside world during meditation are other common uses.
Noise colours are named after light: like white light, white noise contains all frequencies equally. Brown noise, however, is named after Brownian motion, not the colour. The research paints a measured picture: a 2024 meta-analysis of 13 studies found that white and pink noise gave children and young people with ADHD a small but meaningful benefit on attention tasks, while it could slightly lower performance in those without ADHD. The evidence for sleep is weak and mixed. In short: use it if it helps you, but don't treat it as a treatment.
Keep the volume low to medium, especially with headphones and for long listening. For babies, place the device away from the cot and keep it quiet (the American Academy of Pediatrics advises under about 50 decibels, close to a whisper in a quiet room). Take a break if you notice ringing in your ears or discomfort.