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Acoustic transparency in dense granular suspensions
Arnaud Tourin, Yamil Abraham, Marie Palla, Arthur Le Ber, Romain Pierrat, Nicolas Benech, Carlos Negreira, Xiaoping Jia
https://arxiv.org/abs/2510.09486

Acoustic transparency in dense granular suspensions
We demonstrate the existence of a frequency band exhibiting acoustic transparency in 2D and 3D dense granular suspensions, enabling the transmission of a low-frequency ballistic wave excited by a high-frequency broadband ultrasound pulse. This phenomenon is attributed to spatial correlations in the structural disorder of the medium. To support this interpretation, we use an existing model that incorporates such correlations via the structure factor. Its predictions are shown to agree well with …