Amrutha Dasyam, Yutong Xue, Bhisham Sharma and J. Stuart Bolton, “Acoustical properties of granular aerogel agglomerates,” 182nd meeting of the Acoustical Society of America, Denver CO, May 2022. Paper 3aAA8. Abstract published in the Journal of the Acoustical Society of America, Vol. 151, A145, 2022.


Granular aerogel agglomerates obtain their unique mechanical and functional properties from their underlying mesoporous structure and intergranular interactions. In this presentation, we focus on the acoustical properties of granular aerogel layers and present experimental results characterizing the absorption behavior of granular silica aerogels with average particle sizes ranging from 5 μm to 2 mm. Our results show that the absorption behavior of granular aerogels strongly depends on the average particle size. To better understand this particle size dependence, we model the granular agglomerates using Biot’s limp and poro-elastic formulation. Finally, we use the developed model to design layered aerogel granular stacks with wideband sound absorption properties.


Aerogels, Sound absorption, Poro-elastic, Noise Control, Particle stack


Acoustics and Noise Control

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