Low band gap frequencies and multiplexing properties in 1D and 2D mass spring structures
Aly Arafa H†, , Mehaney Ahmed
       

Dispersion curves for wave propagation in the 1D mass spring structure depicted in Fig. 3, with unit cell N = 4. (a) Case 1, there is a damping force represented by four ground springs; (b) Case 1, without a damping force; (c) Case 2, local resonance curve, the soft material (PMMA) in the center replaced by rubber.