posted by Calder .
The sound intensity of 1.0 x 10^-12 J/(m^2*s) is the threshold of hearing for humans. What is the amplitude of the motion of the air molecules? Use v=340m/s and 1.2 kg/m^3 as the density of air.
I believe the formula I would use for this is I=1/2*v*p*A^2*w^2 ...but im not sure because I don't know what w is..