Why Acoustic Metamaterials Enable Noise Control Without Mass—And Its Implications for Sustainable Architecture

声学超材料为何能实现无质量降噪——及其对可持续建筑的意义

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Traditional noise barriers rely on mass law: doubling wall mass yields only 6 dB insertion loss, requiring thick concrete or dense composites with high embodied carbon.
Acoustic metamaterials achieve anomalous sound attenuation through subwavelength resonant structures—such as Helmholtz lattices or labyrinthine channels—that manipulate wave phase and impedance mismatch.

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