Sound Power Emitted Calculator

I want to calculate
Sound Wave Intensity(I) = W/m2
Radius or Distance from Point Source(r) = m
Power Emitted(PAV) = W
 

Sound Power Emitted:
Power Emitted:
PAV＝I*4PI*r2
where,
PAV = Power Emitted,
I = Sound Wave Intensity,
r = Radius or Distance from Point Source.