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Scattering of the metacity cloak by a plane wave source at 20 Hz; (A), (C) concrete buildings on a concrete plate (E = 25e9 [Pa], ρ = 2300 [kg/m3], ν = 0.2); (B), (D) steel buildings (E = 200e9 [Pa], ρ = 7870 [kg/m3], ν = 0.29) on a concrete plate. Color scale is as in Figure 5.
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