In microscale structures, thermal and viscous effects are important factors affecting the effective transmission of acoustic energy. In this paper, the effects of porosity, single thermal effect, single viscous effect, and thermoviscous coupling on the acoustic energy transmission characteristics of microcolumn arrays are analyzed in detail by numerical solution of thermoviscous acoustic equations. The effects of temperature on thermal effect and viscous effects are discussed. The results show that the nonlinear coupling effect of thermal and viscous effects contributes the most to acoustic en...
