Difference between white noise and pink noise?
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Just to add to the previous comments: noise is a mixture of a lot of different frequencies (pitches) at a lot of different amplitudes (loudnesses), in a random, non-regularly repeating fashion.
White noise is like white light: all the “colors” (different wave frequencies) at more or less the same amplitudes.
Pink noise is like white noise, in that it has a lot of different frequencies at different amplitudes, but rather than all frequencies being equally loud, red noise is emphasized. “Red” is the lower end of the visible light spectrum—think “infrared”, which are the wavelengths below red that we can’t see (compare to ultraviolet). So when you mix “all frequencies the same” with “lower frequencies emphasized” you get pink noise. This is why pink noise sounds like it is lower in pitch than white noise.
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