Using a series of standing ultrasound waves, it is possible to suspend small particles at the sound pressure ... to localize the pressure node, or focal point, and levitate small objects around ...

The sound is, as the name implies ... fixed in mid-air where there’s a pressure minimum in the standing wave. [Olimex] has created a small ultrasonic levitation kit that exemplifies this ...

which is faster than the speed of sound and more than twice the speed of a Boeing 737 plane. The train uses magnetic levitation (maglev) technology to reach its incredible speeds, removing the ...