Re: distance vs. strength

>"Getting close is in fact even more effective than that.  Signal strength
>is inversely proportional to the square of the distance. So that half the
>distance means four times the signal strength."

In a free field, sound emanates out from a source in three dimensions. So I 
would think the drop in power is in a sphere relationship, not a square.  In 
that example, halving the distance to the source would achieve eight times 
greater signal, not four.  In the real world, with the ground as a barrier and 
trees etc providing scatter, the actual difference would be somewhere between 
the 
squared and the cubed ratios.


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