Figure 3

Two vertical local standing wave nodes were constructed from a double-sided transducer array that can be independently manipulated. The particle on the left is particle A, and the particle on the right is particle B. (a) The acoustic pressure amplitude of two independently controllable vertical local standing wave fields constructed in space. (b) The force of the constructed local standing wave node in the x-axis direction. (c) The force of the constructed local standing wave node in the z-axis direction.