Brown Noise Generator – Free Online Brown Noise for Sleep, Focus & Testing
Continuous noiseReady
- Start quiet, raise slowly
- Check L/R markings first
- Disable audio enhancements
- Runs inside your browser
- No upload, no account
- Nothing saved after you close
Brown noise generator online
Brown noise is a deep rumble with most of its energy in the bass, similar to a waterfall or strong wind. It is popular for sleep and concentration.
What is brown noise?
Brown (Brownian) noise falls 6 dB per octave.
Brown noise for focus and ADHD
Many people report that the low rumble helps them focus.
Brown noise vs white and pink
Brown is darkest, pink is balanced and white is brightest.
How to Use the
Brown Noise
- 01
Volume
start low; noise is broadband and can be fatiguing.
- 02
Play
press Brown to start endless noise; press again to stop.
- 03
Compare
switch between the six colours to hear the tonal difference.
- 04
Timer
use the sleep timer for a fade-out after a set time.
What is brown noise?
Brown (Brownian) noise falls 6 dB per octave. It is named after Robert Brown and random motion, not the colour.
Brown noise for focus and ADHD
Many people report that the low rumble helps them focus. Evidence is mostly anecdotal, but it is a harmless tool at low level.
Brown noise vs white and pink
Brown is darkest, pink is balanced and white is brightest. Try each for a few minutes; preference is personal.
The “brown note” myth
A claim says an infrasonic tone can cause loss of bowel control. Tests have never shown this, and speakers cannot reproduce such low frequencies at the levels claimed anyway.
Brown noise in practice
Definition in plain words
Brown noise is random sound with a deep tilt across the spectrum.
Perception
Most listeners describe it as a waterfall or distant thunder.
Common uses
Masking distractions, sleep, focus, tinnitus relief and checking speakers.
Compare at a comfortable level
Switch colours at the same volume setting; brighter noise seems louder even at equal energy.
Check bass-heavy noise without overdriving small speakers
Laptop speakers cannot reproduce brown noise’s deep energy; turn down if you hear distortion.
The one-sentence explanation
Brown noise is white noise with the treble gradually removed.
Other low-frequency tones
For specific low tones use the bass test or tone generator.
Related guides and fixes
Learn more in these guides: White vs pink vs brown noise, No sound on Windows, No sound on Mac, Headphones only one side, Speakers crackling, How to test speakers.
Frequently Asked Questions
Q.Is brown noise good for sleep?
Many people prefer it because it has no hiss. Keep the level low.
Q.Is there a brown note?
No reliable evidence exists for it.