A jet airplane has an intensity of 109.7 W/ m2 when heard at a distance of 26.8 m. What is the maximum sound intensity heard by a person on the ground when the airplane is 8500 m overhead?

Answer 1

Intensity(1) x Area(1) = Intensity(2) x Area(2)

109.7 x (pi(26.8)^2) = Intesity(2) x (pi(8500)^2)

Intensity(2) = 1.09 x 10^-3