Article Dans Une Revue Comptes Rendus. Physique Année : 2016

Acoustic metamaterials for sound mitigation

Acoustic Metamaterials for Sound Mitigation Métamatériaux Acoustiques pour l'Isolation Sonique

Résumé

We provide theoretical and numerical analyses of a plate-type acoustic metamaterial behavior considered in an air-borne sound environment in view of sound mitigation application. Two configurations of plate are studied, a spring-mass and a pillar system-based. Acoustic performances of the considered systems are investigated with different approaches and show that a high sound transmission loss (STL) up to 82dB is reached with a metamaterial plate of 0.5mm thickness.

Physical understanding of the acoustic behavior of the metamaterial partition is discussed based on both air-borne and structure-borne approaches. Confrontation between the STL, the band structure, the displacement fields and the effective masse density of the plate metamaterial is made to have a complete physical understanding of the different involved mechanisms.

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Dates et versions

hal-04981043 , version 1 (06-03-2025)

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Badreddine Assouar, Mourad Oudich, Xiaoming Zhou. Acoustic metamaterials for sound mitigation. Comptes Rendus. Physique, 2016, 17 (5), pp.524-532. ⟨10.1016/j.crhy.2016.02.002⟩. ⟨hal-04981043⟩
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