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Develop a rule to describe what happens to the Sound Intensity Level L, as you double your distance from the source of sound. Your rule may be stated in any format and you must show that it is true for all values of L.
 May 24, 2016
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Develop a rule to describe what happens to the Sound Intensity Level L, as you double your distance from the source of sound. Your rule may be stated in any format and you must show that it is true for all values of L.

 

Well i am going to assume that the sound is emitted 3 dimensionally - like in an ever expanding sphere.

 

At d metres , the Surface Area  of the sphere will be  4pi*d^2  

at 2d metres the SA will be  4pi*(2d)^2 = 4pi*d^2 * 4

 

So is you double the distance I think the intensity will  1/4.

 

If intensity is L at  a distance of d 

then

Intensity will be  L/4 at a distance of 2d

 

Intensity will be L / n^2      at a distance of nd

 

That is what I'd expect anyway.

 May 24, 2016

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