Winding down
Some listeners find a low-frequency background less sharp than white noise. It is a listening preference, not a treatment for insomnia.
Sleep collectionBrown Noise — Listen Online
A low, steady rumble with substantially less high-frequency hiss than white noise. Listen without video or sign-up; the ten-minute source master repeats through the continuous player until you stop or your sleep timer expires.
Original 10-minute DSP master
Play Brown Noise
Tap Play to start. No autoplay.
The shared player provides Volume, Sleep Timer and Dark Screen on supported browsers. Without JavaScript, the native audio control remains available.
Continuous loopSleep timerDark screenHLS / MP3
Open the full sound machine
Brown vs Pink vs White Noise
Switch between three different original master files without leaving the page. Use the same player's volume control; the tracks are not automatically loudness-matched.
Brown NoiseDeep, bass-weighted rumblePower density ≈ 1/f²
Pink NoiseLess bass-heavy; soft hissPower density ≈ 1/f
White NoiseBrighter broadband hissNearly flat power per Hz
Master loudness measurements: Brown -27.8 LUFS · Pink -23.6 LUFS · White -22.3 LUFS. Identical volume settings do not mean equal perceived loudness. Reduce the volume before switching if needed.
Explore Pink Noise details and White Noise details.
Why does Brown Noise sound deeper?
Its power spectral density is approximately proportional to 1/f²: for every tenfold increase in frequency, the average power level falls about 20 dB. A phone speaker may not reproduce the deepest bass, so the same audio can sound noticeably different through headphones and speakers.
Ways to listen
Reading and focus
A predictable sound can make some environmental distractions less prominent, although some people concentrate best in silence.
Focus collectionSound masking
Masking adds sound to the environment; it does not cancel or remove sound like active noise cancellation.
Noise masking collectionAudio quality and source details
This is independently synthesized Brown Noise, not a copied sound effect or a field recording. The 10-minute master is real, newly generated DSP material; continuous listening reuses it rather than creating additional hours of unique sound.
- Master duration
- 10 minutes (600 seconds)
- Format
- MP3 · 44.1 kHz · 192 kbps
- Channels
- Two identical channels (centered stereo)
- Measured spectral slope
- -19.97 dB / decade
- Integrated loudness
- -27.8 LUFS (digital file measurement)
- True peak
- -12.1 dBTP
- 250 ms quiet windows below −65 dBFS
- 0 in technical QA
- Production QA
- Technical tests passed; previously reviewed production source
Our native multi-cycle HLS timeline is used where supported, with MP3 looping elsewhere. It is designed not to stop at minute 10. Device/browser interruptions are still possible. For a short manual check, open the loop test, select the production track, and seek to 9:55. Digital LUFS is not a safe sound-pressure measurement at your ears.
Brown Noise questions
What is Brown Noise?
Brown noise, also called red noise in some contexts, emphasizes lower frequencies: its power generally declines proportional to frequency squared. It is not simply white noise played at a lower volume.
How is it different from Pink Noise?
Pink noise falls approximately 10 dB per frequency decade, whereas Brown Noise falls approximately 20 dB per decade. Pink generally sounds brighter than Brown. Use the comparison above to decide what you prefer.
Does Brown Noise improve sleep?
Some people use it as a steady background when winding down, but research does not establish a guaranteed sleep benefit or treatment for insomnia. Keep playback comfortably quiet.
Will it stop after ten minutes?
No. Ten minutes is the master file duration, not the listening session limit. The player loops or uses a pre-authored HLS timeline; device/network interruptions may still occur.
Can it play when my iPhone screen is locked?
Supported Safari devices use native HLS playback designed for longer background sessions. Behavior still depends on iOS and should be checked on your actual device.