Experimental validation of a locally resonant metamaterial plate

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Abstract

An analytical model for broadband sound transmission loss of a finite single leaf wall using a metamaterial was previously developed and validated numerically. It is of interest to validate the analytical model with experimental results. In this paper, the band gap (BG) behavior of a locally resonant metamaterial is tested and compared to the analytical and numerical results. First, the unit cell resonance is measured for four nominally equivalent samples and the material properties extracted. Then, vibration analysis of a finite metamaterial plate is carried out. The influence of the variability of the properties of the resonators due to the construction method is analyzed both experimentally and numerically. Lastly, the result is compared to the analytical model and conclusions drawn. The analytical model could not be fully validated with the experimental measurements, but the specimen exhibited BG behavior. The variability of the resonators has an important influence in the performance of the metamaterial plate.
Original languageEnglish
Title of host publicationProceedings of Inter-noise 2020
Number of pages10
Publication date2020
Publication statusPublished - 2020
Event49th International Congress and Exposition on Noise Control Engineering - Virtual event, Seoul, Korea, Republic of
Duration: 23 Aug 202026 Aug 2020
https://internoise2020.org/

Conference

Conference49th International Congress and Exposition on Noise Control Engineering
LocationVirtual event
CountryKorea, Republic of
CitySeoul
Period23/08/202026/08/2020
Internet address

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