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Jeez. The original author really doesn't know much. Audio noise in electronic circuits can be Johnson noise, which is thermal noise from the electrons and varies with Temp and circuit impedance (and can be shaped by whatever filter effects are in the channel) and is universal and irreducible. Some audio noise appears as "shot" noise in systems where the discrete nature of electron charge is detectable. Shot noise has statistical qualities that differ from the thermal or Johnson noise.
Carver Mead has an interesting article on the equivalence of shot and Johnson-Nyquist noise. In any case they both have a white spectrum at normal frequencies (there are quantum mechanical issues at extreme frequency). https://authors.library.caltech.edu/53119/1/00261888.pdf BTW he might have been buddies with our current protagonist but there is no nonsense reasoning here.
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