・ , the successive time points, at which the FSR measures the normal stress at the inner surface of the BS, ・ , the values of the QE component of the stress measured by the FSR at the above time points ・ , the parameter determined from the calibrating identification for the BS without the AI layer as is described in Remark A.2 ・ , the thickness of the BS ・ , the speed of the bulk acoustic waves in the BS ・ , the stress-relaxation time of the BS ・ an analytical or tabular dependence of the speed of the bulk acoustic waves in the AI on the volumetric mass density of the AI, i.e., dependence in (C.36) (e.g., [2] , Figure 1) ・ , the volumetric mass density of air (e.g., see (1.2)) ・ , the volumetric mass density of the continuous, non-porous AI (e.g., see (1.3)) |