Barry_Green
Moderator
You're right, as it refers to light. But in sound it's different, because we're dealing with two different concepts: amplitude, vs. power. As you cut the distance in half, the power increases by 4x but the amplitude (the volume) doubles. The amplitude (in pressure, or velocity) is basically related to the square root of the power. 4x the power, square root of 4x = 2, so 2x as much volume/amplitude).one quick note though, the segment on the inverse square law is confusing me a bit, shouldn't it state that when you half the distance from subject that you are ultimately amplifying the signal by (4) not by (2) as stated in the DVD?
We went with a simpler explanation because hey, math doesn't matter, what matters is how loud the signal is. And in that case, half the distance = twice the volume.
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