Brown Noise & Noise Color Generator
Deep rumbling soundscapes for rapid sleep onset and focused work.
Lower is softer and deeper.
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- 1
Pick a noise color. Brown is the deepest and most common choice for sleep. Pink sits between brown and white. Green is gentler mid-range calm, and white is the brightest masking.
- 2
Set the volume just above the noise you want to cover. The sound should sit slightly louder than the traffic, snoring, or hum you are masking — not louder than a normal conversation.
- 3
Adjust the tone until it stops sounding harsh. Drag tone warmth to the left for a softer, muffled rumble and to the right for more detail. Warmer settings are easier to sleep through.
- 4
Choose a sleep timer. 45 to 90 minutes covers the time it takes most people to fall asleep and reach deep sleep. Set it to Off for all-night masking or focus work.
- 5
Press play and leave the tab open. Playback runs entirely in this browser tab, so it stops if you close it. The tool holds your display awake on its own while a sound is playing.
How brown noise helps you fall asleep
Brown noise — also called red or Brownian noise — drops in intensity by 6 dB per octave as frequency rises. That produces a deep, steady rumble closer to distant thunder or a strong ocean swell than to static.
White noise carries equal energy across every audible frequency, which many people find harsh at bedtime. Brown noise dampens the high end instead, so it covers traffic, snoring, and hallway sounds without the hiss that keeps an alert mind engaged.
Which noise colour should you pick?
Brown is the deepest and the usual starting point for insomnia and racing thoughts. Pink sits in the middle with a rain-like balance and is the colour used in most slow-wave sleep research.
Green concentrates around 500 Hz and resembles forest wind for daytime calm. White is the brightest and best at masking short, sharp interruptions such as a door closing.