Water, sand, and carbon dioxide-based fire extinguishers ... Using an air vortex cannon to focus the sound waves from the bass reflex port, it ‘wiggles’ the flame out in a matter of seconds ...

Imagine standing in the heart of a sun-scorched desert. The wind hushes, the world holds its breath, and suddenly, a deep, thunderous boom rolls across the sand—so startling and powerful, it seems as ...

R. W. WOOD and one of us (Loomis) have described (Phil. Mag., 4, 417; September 1927) certain physical and biological effects observed with high frequency sound waves of great intensity.