We’re familiar with white noice, but how about pink and brown noise? As it turns out they all exist, they all have distinct acoustic profiles, and they all have different uses. More from Bobby Owsinski’s blog:
White is…pretty harsh sounding, and doesn’t represent too much of what we hear in nature, but it’s been found to be extremely useful of one thing – it’s masking effect…. Pink is used most often in audio testing because it closely approximates how we hear. The energy rolls off at about 3dB per octave, and the acoustic energy is equal in all frequency bands. In other words, it’s white noise with decreased high frequencies. Since our hearing is more sensitive to higher frequencies than lower ones, that makes the spectrum of pink noise excellent for acoustic tests like room tuning.
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