Tuning the mass density and bulk modulus independently is the key to manipulate the propagation of sound wave. Acoustic metamaterials provide a feasible method to realize various acoustic parameters. However. the relevant studies are mainly concentrated in air. https://mysocialfeeder.com/story4381065/carbon-storage-simulation-and-analysis-in-beijing-tianjin-hebei-region-based-on-ca-plus-model-under-dual-carbon-background