Japanese Scientists Levitate, Move Objects in Mid-Air Using Sound Waves

What do you get if you mate the ultrasonic technology of a sonoluminescence setup, with the ideas behind a paul and/or penning trap (sorta kinda, also they're usually electromagnetically based)

I always wanted to build a penning trap and levitate a dust spec in a vacuum chamber and then using an interferometer and some DSP make a hell of a seismograph. I'd probably just end up electrocuted, dust spec penning traps run a couple hundred volts...