Labyrinthine Structure with Subwavelength and Broadband Sound Insulation

Figure 2

(a)–(c) Four-to eight-times-folded labyrinthine acoustic metamaterial band structures. (d)–(f) Six-times-folded labyrinthine acoustic metamaterial band structures with sound channel widths of 2 mm, 4 mm, and 5 mm. The omnidirectional bandgaps of the structures are highlighted using light blue shading.

(a)

(b)

(c)

(d)

(e)

(f)