Broadband low-frequency bidimensional honeycomb lattice metastructure based on the coupling of subwavelength resonators

Denilson Ramos,Luís Godinho,Paulo Amado-Mendes,Paulo Mareze

Applied Acoustics（2022）

引用 4|浏览2

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摘要

•An 3d printed absorber with subwavelength thickness (L=λ/52=20 mm) based on the axial coupling of six Helmholtz Resonators is proposed.•The significant sound absorption band comprises a wideband of approximately Δf = 300 Hz (300 Hz to 600 Hz), with an absorption peak greater than 0.8.

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关键词

Acoustic metamaterial,Sound absorption,Critical coupling,Perfect sound absorption

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