Why Is Brown Noise Called Brown Noise?

What Is Brown Noise, Quickly?

Brown noise is a type of sound with deeper, richer frequencies than white or pink noise. Think: crashing waves, distant thunder, or a low, steady hum — perfect for calming the nervous system or blocking out distractions.

But while white noise spreads sound evenly across all frequencies, brown noise drops the high tones and emphasizes the bass. It’s fuller, softer, and often more comforting.

The “Brown” Comes From Brownian Motion

The name “brown noise” comes from Brownian motion — the natural, random movement of particles, first described by botanist Robert Brown in the 1800s.

Scientists used the same kind of randomness to generate the frequency curve behind brown noise. So, the name is a nod to the science — not the color. Pretty cool, right?

It’s Not About Color — It’s About Motion

Unlike color-based naming (like white or pink noise), brown noise is rooted in physics. The term reflects the pattern of sound distribution, not how it feels or looks. That’s why it sounds more like a steady wave than a sharp hiss.

So next time you drift off to brown noise, know you’re actually listening to the soothing randomness of nature itself — just reimagined through sound.

Drift Off with Liqsy

Wrap your senses in warmth and let brown noise be part of your bedtime vibe. With Liqsy’s dreamy essentials, you’re one step closer to your calmest, coziest night yet.