Guide / Updated 24 October 2026
Brown noise versus white noise
Brown noise strongly favors lower frequencies, while white noise spreads energy more evenly. Brown often sounds like a deep rush rather than a hiss. Source ↗
- Brown emphasizes low frequencies; white stays bright.
- Small speakers may hide much of brown noise.
- Neither color has a fixed safe loudness.
How to try it
Try both on the same speaker and listen for the sound you actually need to cover. Brown may feel calmer but leave high-pitched noises exposed. White may mask more broadly yet feel too bright for long listening.
- Try both on the same speaker and listen for the sound you actually need to cover.
- Brown may feel calmer but leave high-pitched noises exposed.
- Do not treat the brown label as a promise of lower loudness.
What to consider
Do not treat the brown label as a promise of lower loudness. A bass-heavy speaker can still play brown noise at a high acoustic level even when the slider number is small.
What changes spectrally
White noise has a relatively even idealized spectrum and sounds bright. Brown falls steeply toward higher frequencies and is often heard as a low rush. The sound you get from either button also depends on the speaker; a phone cannot reproduce deep bass like a larger device.
Do not choose from the names alone. Listen where you plan to sleep, at a quiet level, and notice whether one texture becomes less noticeable after a minute.
Mask the right sound
Brown can be pleasant against a low environmental rumble but may leave sharp clicks or voices exposed. White can soften some high-frequency changes, though its hiss may feel harsh. If neither helps at a gentle level, lower the real disturbance through placement, maintenance or a quieter room.
A bass speaker near a wall can make brown noise physically strong even if the browser slider appears modest. Recheck volume after moving it.
Consider the evidence
The sleep-aid review does not establish brown as a special sleep intervention. Popular descriptions of “deeper” sound are about spectral balance and preference, not proven changes to sleep stages.
Treat the generator as a listening tool. Compare several nights if you want to know whether it helps your room, and stop using it if the added sound becomes distracting.
Use a modest duration
A timer is reasonable when masking matters only while you settle. If disturbances persist later, use a longer setting but keep the level low. The browser may suspend after a phone lock, so test it before relying on all-night playback.
If you want saved layered sounds and dedicated iPhone controls, SleepMix offers them; the online tool focuses on a clean comparison of noise colors.
Do not equate depth with effectiveness
A deep texture may feel comforting at first but leave the exact short sound that wakes you unchanged. Make the final choice after observing an ordinary interruption, not after a dramatic one-second demo. If either color only works at an intrusive level, seek a room or source change, and take a break from added sound while you decide what would make the bedroom quieter.
Common questions
Why is brown quieter on my phone?
The phone may reproduce very little bass. Avoid solving this by raising volume excessively.
Can brown cover a beep?
Its limited high-frequency energy may leave a beep prominent; white or pink could fit better.
Is brown safer for long listening?
No. Safety depends on actual acoustic output and duration, not the color label.