Realization of broadband impedance matching via non-local acoustic material. (IMAGE)

Science China Press

Realization of broadband impedance matching via non-local acoustic material.

Caption

(a) Schematic of the non-local metamaterial consisting of 36 CNEHRs (the right panel shows the 3D-printed sample). (b) Theoretical half-maximum relative bandwidth of resonance modes. (c) Theoretical (lines) and measured (circles) acoustic resistance and reactance of the non-local metamaterial absorber. (d) Theoretical (lines) and measured (circles) absorption spectra of the non-local metamaterial absorber. (e) Simulated pressure (indicated by color) and energy flux (indicated by green arrows) fields at 0.1 mm above the non-local metamaterial.

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