Asked by Patricia
The intensity of a certain sound at your eardrum is 0.0030 W/m^2. Calculate the rate P at which sound energy hits your eardrum. Assume that the area of your eardrum is about 51 mm^2.
I found this to be 1.53x10^-4 using I=P/A
What power output P0 is required from a point source that is 3.5 m away in order to create the same intensity at your eardrum?
What equation should be used here?
I found this to be 1.53x10^-4 using I=P/A
What power output P0 is required from a point source that is 3.5 m away in order to create the same intensity at your eardrum?
What equation should be used here?
Answers
Answered by
bobpursley
I=P*A = .003*51*10^-6 watts not same as yours.
I=Io/distance^1
intensity decreases as distance ^2, fo Io=3.5^2 * I above
I=Io/distance^1
intensity decreases as distance ^2, fo Io=3.5^2 * I above
Answered by
Damon
power /(4 pi r^2) = intensity
0.0030 W/m^2 = power/ (4 pi r^2)
0.0030 W/m^2 = power/ (4 pi r^2)
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