FIG. 6.

Admittance responses of the canal wall Y _wall and the air enclosed in the canal Y _can with a 25-Hz frequency resolution. Admittance magnitudes (A) and phases (B) of Y _wall are presented for low-impedance (green), baseline (red) and high-impedance (blue) parameters and for three intermediate cases (Young’s moduli of 40, 80 and 160 kPa for the canal soft tissue) to illustrate the smooth transition of the admittance response between the low-impedance and baseline models. The admittance magnitude and phase for the air enclosed in the canal Y _can presented as solid black lines; the phase is constant at 90 ° over the entire frequency range.