Labyrinthine Structure with Subwavelength and Broadband Sound Insulation

Figure 4

(a)–(c) Transmission losses of four-to eight-times-folded labyrinthine acoustic metamaterials. (d)–(f) Transmission losses of six-times-folded labyrinthine acoustic metamaterials with widths of 2 mm, 4 mm, and 5 mm.

(a)

(b)

(c)

(d)

(e)

(f)