Sleep Island · Official
Brown Noise
Free brown noise online: a deep rumble like distant surf or an airplane cabin. Loops seamlessly to mask low-frequency noise, sleep and focus.
Sleep, Focus, Noise Masking
Synthesized by Sleep Island as a seamless 3-minute loop.
Brown noise puts its energy in the low frequencies and drops off steeply as pitch rises, so there is almost none of white noise’s hiss, just a deep, full rumble. People use it to cover low-pitched noise like footsteps upstairs, an air conditioner or traffic, and plenty use it to shut out distractions while studying or coding.
If you want it even deeper, try Deep Brown Noise; if it feels too muffled, switch to pink noise. This track is synthesized by Sleep Island as a seamless three-minute loop, made to play all night.
The web player loops the current preview audio. Choose a timer from 15 minutes to 2 hours, or keep it looping; timed playback fades out gently. The timer sets your listening session, not the original track length.
