Panneton Raymond
GAUS, Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, Qc, Canada, J1K 2R1.
J Acoust Soc Am. 2007 Dec;122(6):EL217-22. doi: 10.1121/1.2800895.
In this letter, the low and high frequency limits of the effective density characterizing a limp frame porous medium are investigated. These theoretical limits are compared to the ones found for a classical rigid frame porous medium, and to experimental measurements. While the high frequency asymptotic behaviors of both limp and rigid effective densities are usually only slightly different, their low frequency behaviors are significantly different. Compared to experimental measurements performed on a limp frame fibrous layer, only the limp frame effective density yields good correlations over the whole frequency range.
在这封信中，研究了表征柔性框架多孔介质的有效密度的低频和高频极限。将这些理论极限与经典刚性框架多孔介质的极限以及实验测量结果进行了比较。虽然柔性和刚性有效密度的高频渐近行为通常只有轻微差异，但它们的低频行为却有显著不同。与在柔性框架纤维层上进行的实验测量相比，只有柔性框架有效密度在整个频率范围内都能产生良好的相关性。
