Brown noise is a low, rumbling sound with more energy at lower frequencies than white or pink noise. It can resemble distant thunder or a deep waterfall without a melody to follow. love.fm includes a live brown-noise sound with a gentle low-pass filter, alongside matching recordings when they are available in the library.
It may appeal to people who find brighter noise tiring or want a steady background while reading, working, or settling down. That is a preference, not a proven concentration benefit. In the 2024 review covered in our research notes, the researchers found no brown-noise studies to include. Results for white and pink noise cannot simply be transferred to brown noise.
For sleep, evidence about continuous noise in general is very low quality and mixed. Masking an occasional outside sound is not the same as improving sleep itself. Keep the volume low, compare it with silence, and use a sleep timer rather than assuming all-night playback is better. If the sound feels distracting, stop or try something else. Our research page explains the studies and their limitations; this player offers a choice, not a treatment.
What the research says: sources and caveats