Press Start or Space · sound plays only after you start it
Brown Noise Generator
Quick answer
What is the Brown Noise Generator?
A brown noise generator plays a deep, rumbling sound whose power falls steeply at higher frequencies, like a waterfall or strong wind. It is softer than white noise, so many people prefer it for sleep, ADHD focus, and masking low-frequency noise such as traffic or snoring.
Key features
- True brown (Brownian) noise, generated live
- Low-pass and high-pass tone shaping
- Volume control and sleep timer
- Switch to white or pink noise in one click
Why use it
- Gentle, bass-heavy sound for long sessions
- Popular for focus and deep work
- Free, works offline once loaded
Built and tested by Whitson Rao
About the Brown Noise Generator
A brown noise generator for deep focus and sleep. Brown noise puts most of its energy in the low frequencies, so it sounds like a distant waterfall or a steady rumble rather than a hiss. Press Start, set the volume in decibels, soften or trim it with a filter, and let the sleep timer fade it out. Compare it with the White Noise Generator and the Pink Noise Generator using the switch on the stage.
How to use the Brown Noise Generator
Press Start. Nothing plays until you do.
Set the volume; brown noise feels quieter than white noise at the same level, so go slowly.
Add a low-pass filter for an even deeper rumble, or a high-pass filter to remove the lowest boom on small speakers.
Choose an optional sleep timer and a visual.
Press F or click Fullscreen to fill your display, and press Esc to exit.
Common uses
Deep focus
Many people, including some with ADHD, say brown noise helps them settle into work.
Sleep
Its soft, low tone is gentle enough to leave on for hours.
Masking low sounds
Covers traffic rumble, footsteps and air conditioning hum.
Wind-down
Pair it with a dark screen in the evening.
Frequently asked questions
How is brown noise different from white and pink noise?
Brown noise loses power quickly as frequency rises (about 6 dB per octave), so it is the deepest of the three. Pink noise is in between, and white noise is the brightest.
Why is it called brown noise?
It is named after Brownian motion, the random movement of particles, not the colour brown. It is also called red noise.
Why can I barely hear it on my phone?
Small speakers cannot reproduce deep bass. Use headphones or larger speakers, or add a high-pass filter and raise the volume a little.