Brown noise vs white noise

What changes between the sounds?

Brown noise

Lower frequencies carry more energy. Its power per hertz falls roughly 6 dB each time frequency doubles, reducing the high-frequency hiss.

White noise

Power per hertz stays flat. Higher octaves cover more hertz, which contributes to its brighter sound.

Pink noise

Pink noise falls between them in spectral slope: power per hertz drops about 3 dB per octave. Each octave carries equal energy, with less high-frequency emphasis than white noise.

Frequency relationships: MathWorks’ colored-noise reference.

Which sound should you choose?

If white noise feels too bright, compare it with the lower rumble of brown noise at a comfortable volume. If brown noise feels too heavy, a lighter tone may suit you better. Your speakers or headphones also change what you hear.

For work or studying and nighttime listening, start with the sound you find least distracting. A noise color describes its frequency balance, not a guaranteed result.

Adjust brown noise with Brown FM

Explore how Brown FM generates its sound.

Brown FM generates continuous brown noise on your iPhone. Depth and texture let you tune the tone and detail; space adjusts the stereo width, and movement lets the tone change gently over time. Save your settings and use a timer with gradual fades.

Requires iOS 26 or later and a subscription or lifetime purchase. See compare app features and pricing.