Assume that the displacement (s) of air is proportional to the pressure difference $\left(\text{ΔP}\right)$ created by a sound wave. Displacement (S) further depends on the speed of sound $\left(v\right),$ density of air $\left(\text{ρ}\right)$ and the frequency  $\left(\text{f}\right)\text{.If ΔP}~\text{10Pa, v}~\text{300m/s,ρ}~{\text{1kg/m}}^{\text{3}}$ and $\text{f}~\text{1000Hz}$ then s will be of  the order of ( take multiplicative constant to be 1)