Acoustic-wave reflection from a gas−droplet–mixture boundary

Abstract

The problem on acoustic-wave reflection from the boundary of a gas−droplet mixture is considered. For the interface between the pure gas and the gas−droplet mixture at a wave inclined incidence, a nonmonotonic dependence of the reflectance on the volume content of droplets is established. The values of the critical wave-incidence angle and the volume content of inclusions at which the reflectance vanishes are found and illustrated. The possibility of occurrence of the lowest reflectance in dependence on the frequency of perturbations in a certain interval of the wave-incidence angle related mainly to the difference in the densities of the gas-droplet mixture and the pure gas is shown.