190213-N-CM812-161 INDIAN HEAD, Md. (Feb. 13, 2019) Matt Paesch, a chemical engineer in the Naval Surface Warfare Center Indian Head explosive ordnance technology division's explosives and energetics division, prepares the five-gallon resonant acoustic mixer for use, Feb. 13, 2019. Resonant acoustic mixer technology allows non-contact blending by utilizing high intensity vibrations to create efficient particle collisions and acoustic waves. (U.S. Navy photo by Matthew Poynor/Released)