Question
Tue May 29, 2012 By:

Why does sound fade out at a distance from the source?

Expert Reply
Tue May 29, 2012
Sound is a compressional wave , i.e , pressure. And pressure is defined as Force per unit area or you may write
P =F/A.
Thus when A increases the pressure decreases. Now sound waves looks like a circle where its center is the origin of the sound and the circle gets bigger as we go further from its center this means that the area covered increases and the sound compressional waves ( pressure) decreases.
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