🔊 Acoustic Levitator: Standing Wave, Gorkov Trap and the Density Limit for Levitation (2D side view)

Vertical cross-section of an acoustic levitator between an emitter and a reflector. Tune frequency, gap, sound level, bead density and size, and see the pressure nodes, the cavity resonance, the trap that holds each bead just below a node and the point where a bead becomes too heavy to hold. The 3D kit is an illustration; this page adds the real standing-wave physics with four in-page numerical checks.