A point source is emitting sound waves of intensity 16 × 10^-8 Wm^-2 at the origin. The difference in intensity (magnitude only) at two points…

A point source is emitting sound waves of intensity $\displaystyle 16 \times 10^{-8} \mathrm{Wm}^{-2}$ at the origin. The difference in intensity (magnitude only) at two points located at a distances of $\displaystyle 2 m$ and $\displaystyle 4 m$ from the origin respectively will be $\displaystyle \_\_\_\_$ $\displaystyle \times 10^{-8} \mathrm{Wm}^{-2}$.