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Fig. 7 | Nano Convergence

Fig. 7

From: Acoustic wave science realized by metamaterials

Fig. 7

a, b are adapted from [54]

a Experimental scheme for near-zero mass density. b Instantaneous 2D pressure distributions measured at 1.2 kHz for incidence angle θ = 0° are measured for three cases: no wall, presence of holes and presence of membranes.

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