Figure 2.

This image shows the data capture setup for this field experiment on one side of the experimental area. This setup is mirrored on the other side of the shed. Two CCTV cameras are pointed at the food table (A), one close to the shed to record the entire food table and surrounding area (B) and the other to record the top of the food table (C). The white panel mounted on the shed (D) is the parametric array speaker that allows the sound beam to cover one food table while being inaudible on the other food table