Investigation on the Band Gap and Negative Properties of Concentric Ring Acoustic Metamaterial

Figure 5

Vibration modes at the lower edge (a) and upper edge (b) of the first band gap; vibration modes at the lower edge (c) and upper edge (d) of the second band gap of the dual-oscillator acoustic metamaterial system. The color bar represents the normalized displacement.

(a)

(b)

(c)

(d)