Figure 3

Solid metal sphere experiments. Time-domain S₁₁ measurement for aluminum spheres with diameters: (a) 0.79 mm, (b) 1.98 mm, (c) 2.38 mm, (d) 3.18 mm. The center lobe that marks the center of the T-junction is denoted by a green arrow. (e) Peak S₁₁ value (averaged over 8 peaks) for each sphere drop, as a function of sphere diameter. (f) Measured waveform for sphere with 3.18 mm diameter. Extrema are marked in red and can be associated with known positions in the T-junction. (g) The time stamps of extrema in (f) are plotted with position. A second-order polynomial curve fit is applied.