Asked by Ziyi

How many times larger is the intensity of a sound if you move from 20 m away from it to a distance of 2m?
I think I'm supposed to use the ratio (r1/r2)^2, but I don't know which is which; I don't even know if that's the correct formula.
Answered by bobpursley
you are moving it a distance of ten times, so intensity increases 100 times. Isn't that 10 db?
Answered by Ziyi
I think so, so I divide the current distance by the new one and square, right? because that's what I'm getting from the equation, so, I think I get it, thank you! :)
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