White Noise, Pink Noise, and Brown Noise: What's the Difference?

White noise includes all audible frequencies. Energy is equally distributed across these frequencies, unlike the energy in pink noise. The equal distribution creates a steady humming sound. White noise examples include: 1. whirring fan 2. radio or television static 3. hissing radiator 4. humming air conditioner Since white noise contains all freque...

Brown noise, also called red noise, has higher energy at lower frequencies. This makes it deeper than pink and white noise. Examples of brown noise include: 1. low roaring 2. strong waterfalls 3. thunder Though brown noise is deeper than white noise, they sound similar to the human ear. There isn’t enough hard research to support the effectiveness ...

Black noise is an informal term used to describe lack of noise. It refers to complete silence or mostly silence with bits of random noise. While it may be difficult to find complete silence, it can help you sleep at night. Some people feel most relaxed when there is little to no noise.