Deeper, warmer and less hissy than white noise. Think of a low waterfall or the inside of an aeroplane cabin — a rumble that sits underneath everything rather than sitting on top of it.
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The difference is where the energy sits. White noise spreads it evenly across all frequencies, which can sound sharp or "static-y". Brown noise rolls off the high frequencies hard, so most of what you hear is low and soft. Many people who find white noise too bright prefer brown for exactly that reason.
You can hear the difference in one click on this page — switch between the two tiles while the player is running. You can also layer rain on top of brown noise, a combination that keeps the low rumble while adding a bit of movement.
There is no universal answer — it depends on whether you find high frequencies harsh. Brown noise is the softer of the two; try both at low volume and keep whichever you stop noticing first.
Yes. Click the small + on any second sound tile to layer it underneath. Each layer has its own level so the mix stays gentle.
No. Nothing is streamed. The browser generates the waveform locally, which uses far less data than an audio stream or a video.