Researchers have come up a means to levitate a 2-inch solid polystyrene sphere using ultrasonic acoustic waves pitched above the frequency a human can hear. Skip to main content.

In a new study, researchers have experimentally demonstrated the acoustic levitation of a 50-mm (2-inch) solid polystyrene sphere using ultrasound—acoustic waves that are above the frequency of human ...

If this little face looks a little . . . well, deflated, that’s because it literally is. This is a scanning electron microscope image of a hollow polystyrene sphere. When Arkaprabha Giri, a ...