White, pink and brown: what's the difference?
White noise has equal energy at every frequency, which our ears hear as bright and hissy. Pink noise has less energy as frequency rises (equal energy per octave), so it sounds more balanced, like steady rain. Brown noise drops off even more steeply, leaving a deep, soft rumble like a waterfall or distant traffic.
What people use it for
- Masking distracting sounds while working or studying
- Falling asleep in a noisy place
- Covering tinnitus temporarily (ask a doctor for advice if it's persistent)
Evidence on noise for sleep and focus is mixed, and preferences vary a lot from person to person, so try all three. Keep the volume low, especially for long listening or for babies.
Questions
Which noise is best for sleep?
There's no single answer. Many people prefer brown or pink noise because they're less harsh than white. Try each at a low volume.
Does white noise help you focus?
Some people find it helps by masking distractions; others find it distracting. Research results are mixed.
Is it safe to sleep with noise playing?
Keep it quiet: a low, steady level is the safe choice, especially for children.
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