Behavior of low-frequency sound waves in porous media

Low-Frequency;sound waves;impedance tube;gravel;glass spheres;tortuosity;porosity;flow resistivity;attenuation coefficient;phase constant

Rossi, Tyler J. ; Swenson ; George W.

关键词: Low-Frequency;    sound waves;    impedance tube;    gravel;    glass spheres;    tortuosity;    porosity;    flow resistivity;    attenuation coefficient;    phase constant;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/16873/Rossi_Tyler.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

This is a study of the relationship between the measured acoustic parameters and the measured physical parameters of porous media. Materials studied include crushed limestone, stream-formed pea gravel, large and small sifted pea gravels, and glass spheres. A standing wave curve fitting algorithm was applied to data taken from a vertical impedance tube to determine the propagation and reflection parameters of the materials. Physical characteristics considered include porosity, tortuosity, and flow resistivity.