Fig. 12: Meta-structures are constructed with the consideration of dual consecutive Fano resonance for broadband sound isolation.
From: Resonance-based acoustic ventilated metamaterials for sound insulation
a The helical metamaterial and sound transmission loss spectra. Reproduced with permission from ref. 64. b The metamaterial for attenuating broadband diffused sound and sound transmission loss spectra. Reproduced with permission from ref. 56. c The reconfigurable metamaterial and sound transmission loss spectra at s’ = 5 mm and s’ = 25 mm. s’ is the spacing of the zigzag channel after sliding. Reproduced with permission from ref. 66.
