Fig. displays the lifetimes of D-O phonons inside the sized water droplets and the NaBr solutions of different concentrations . The phonon lifetime increases from 2.6 ps for pristine water to 3.9 and 6.7 ps for solutions of 32 and 8 H2O per NaBr solute, respectively. The phonon lifetime depends linearly on the total volume of supersolid hydration cells of the solution. In contrast, the phonon lifetime increases from 2.6 ps to 18 and 50 ps for droplets of 4.0 to 1.7 nm in size . The much longer phonon lifetime contains components of the skin supersolidity and the boundary reflection that forms quasi-standing waves.