Fractal Acoustic Metamaterials with Subwavelength and Broadband Sound Insulation

Figure 2

Band structures of fractal acoustic metamaterials. (a) Band structure of first-order fractal acoustic metamaterials in the frequency range [0 Hz, 2850 Hz]. (b) Band structure of second-order fractal acoustic metamaterials in the frequency range [0 Hz, 2850 Hz]. (c) Band structure of third-order fractal acoustic metamaterials in the frequency range [0 Hz, 2850 Hz].

(a)

(b)

(c)