TY - EJOU AU - Chen, Wei AU - Guo, Zhaofeng AU - Feng, Hongda AU - Hu, Sheng AU - Lu, Ling AU - Chen, Chuanmin AU - Wu, Xiaowen AU - Cao, Hao TI - Optimization of Sound Absorption and Insulation Performances of a Dual-Cavity Resonant Micro-Perforated Plate T2 - Fluid Dynamics \& Materials Processing PY - 2022 VL - 18 IS - 2 SN - 1555-2578 AB - This study investigates a dual-cavity resonant composite sound-absorbing structure based on a micro-perforated plate. Using the COMSOL impedance tube model, the effects of various structural parameters on sound absorption and sound insulation performances are analyzed. Results show that the aperture of the micro-perforated plate has the greatest influence on the sound absorption coefficient; the smaller the aperture, the greater is this coefficient. The thickness of the resonance plate has the most significant influence on the sound insulation and resonance frequency; the greater the thickness, the wider the frequency domain in which sound insulation is obtained. In addition, the effect of filling the structural cavity with porous foam ceramics has been studied, and it has been found that the porosity and thickness of the porous material have a significant effect on the sound absorption coefficient and sound insulation, while the pore size exhibits a limited influence. KW - Micro perforated plate; double cavity; compound resonance structure; sound absorption coefficient; sound insulation DO - 10.32604/fdmp.2022.015746