Noise generator
Brown noise generator.
Deep, smooth, click-free brown noise — like distant rain or surf — that loops for as long as you like, with a sleep timer.
Deep and low, like heavy rain or distant surf.
About brown noise
Brown noise — sometimes called red noise — is the deepest of the common noise colours. Its energy is heavily weighted toward the low frequencies (falling 6 dB per octave as pitch rises), so instead of a bright hiss you get a soft, rolling rumble like heavy rain or distant surf.
The name has nothing to do with the colour: it comes from “Brownian motion”, the random walk that describes how the waveform is built — which is why brown noise is also known as Brownian noise, and occasionally red noise. If you searched for a brownian noise generator, this is the same thing. It creates that low rumble in your browser and loops it seamlessly, with a brightness control to lift some detail back in and a sleep timer to fade it out.
Brown noise has become especially popular as a warm background for concentration — many people reach for brown noise for focus while working or studying, and for settling down or sleep. We make no health claims; the honest test is to play it and see how it feels. Because it’s concentrated in the low end, larger speakers or over-ear headphones reproduce it best — on small laptop or phone speakers it can sound thin. If it sounds too dark, raise the brightness or try pink or white noise.
Brown noise FAQ
What is brown noise?
Brown noise (also called red noise) rolls off the higher frequencies steeply — its power drops by 6 dB per octave — leaving a deep, low rumble. It is the deepest and softest-sounding of the common noise colours.
What does brown noise sound like?
People usually compare it to heavy rain, a waterfall, distant thunder, or the low roar of an aircraft cabin. There is very little high-frequency hiss, so it feels warm and rounded.
Why has brown noise become popular?
It is widely shared as a background sound for concentration and for winding down, and many people simply find its deep, even rumble pleasant. We make no health claims — the best test is to play it and see how it feels for you.
Do I need good speakers or headphones?
Because brown noise is concentrated in the low frequencies, larger speakers or over-ear headphones reproduce it best. On small laptop or phone speakers it can sound thin.
Other colours: white noise, pink noise, or the noise generator overview.