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The difference between loudness and sound volume (SPL) is far from obvious to many casual Earthling readers. Worth pointing out in this context? I already said I think so. If you don't care about the link, then don't click on it. 

Occam's Razor? What competing theories are being tested here? If you mean ""Apply some parsimony,"" why be parsimonious with connections to other information in an encyclopedia? 

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