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

Figure 7

Vibration modes at lower edge (a) and upper edge (b) of the first band gap, at lower edge (c) and upper edge (d) of the second band gap, and at lower edge (e) and upper edge (f) of the third band gap in the triple-oscillator acoustic metamaterial system. The color bar represents the normalized displacement.

(a)

(b)

(c)

(d)

(e)

(f)