I find it a little confusing that the author compares 1/f noise from the brain (electrical) with acoustic pink noise, which is a different type of wave altogether. Am I missing something or is it just a poor analogy?
Not read it, but 1/f frequency distribution is pink noise. Is your point that the origin of the oscillations is different? It is natural to wonder about common causes for common patterns no? Eg thermodynamics and black holes. So doesn't necessarily seem to be a poor analogy