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Figure 3

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Normal velocity field at 332 Hz. (a) direct reference computation without object; (b)–(e) u-iPTF results with the presence of a 15 cm wide rigid obstacle at a distance of (b) 1 cm, (c) 5 cm, (d) 10 cm, and (e) 15 cm from the plate. The frames represent the shape of the rigid object in top view.
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