Iterating on the research of Asier Marzo, I developed a device capable of levitating small objects for the purpose of immersive displays. The effect is mesmerizing in person, with objects pinned or rotating in the air without touching anything. This is done through acoustophoresis, or acoustic trapping. Each little black component you see on the surface can be thought of as a tiny speaker, and with involved control over the phase, amplitude, and frequency of the individual speakers, you can control the movement of the little objects hovering between them.  Acoustic nodes are formed by such a configuration- tiny areas of low pressure surrounded by an area of high pressure, keeping objects in the low pressure area.