Time series of the two degrees of freedom of the system. f = 85 Hz, V = 0.025 V. The blue curves show the scaled displacement of the air at the end of the tube and the red curves show the scaled displacement at the center of the membrane. Top left: measured time responses. Top right: the numerically determined time responses using the parameters identified from the HBM. Bottom: the temporal responses determined numerically using the parameters identified from the CX-A method. Configuration 1: h_m = 0.23 mm, R_m = 5 cm, f_m = 45 Hz. (a) The measured time responses. (b) The numerically determined time responses using the parameters identified from the HBM. (c) The numerically determined time responses using the parameters identified from the CX-A method.