Figure 4
From: Dynamics of levitated objects in acoustic vortex fields
Levitating dense objects in acoustic vortex fields (top view). (a–d) The levitated objects are silicone oil, silicone bubble, water droplet and Chimonanthus (Wintersweet) flower, respectively. Note that the array with three transducers is used for (a and b) and the array with four transducers for (c and d).
