Sound Propagation in Porous Media: Upscaling Methods, Optimization and Validation
نویسندگان
چکیده
/department of mechanical engineering Introduction Noise reduction is a key issue for High-tech and high precision instruments. To reduce the noise levels emitted by internal or external sources, porous materials can be used for acoustic shielding. The acoustic wave penetrates into the pore network, and part of its energy is dissipated as heat by viscous friction and thermal-elastic damping, material mechanical damping and Helmholtz type resonators [1]. Therefore acoustic properties of porous materials are highly sensitive to geometrical and mechanical properties of the microstructure.
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