The specific impedance in N·s/m^{3} of the air load on one side of a plane piston mounted in an infinite baffle (see Fig. 13.3) and vibrating sinusoidally is given by Eqs. (13.116)–(13.118). Plots of the real and imaginary parts of

$\frac{{Z}_{s}}{{\rho}_{\text{0}}c}=\frac{{R}_{s}+j{X}_{s}}{{\rho}_{\text{0}}c}$

(4.145)

are shown in Fig. 4.35 as a function of ka. Similar graphs of the real and imaginary parts of the specific admittance

${Y}_{s}{\rho}_{\text{0}}c={\rho}_{\text{0}}c\left({G}_{s}+j{B}_{s}\right)={\rho}_{\text{0}}c\left(\frac{{R}_{s}}{{R}_{s}^{2}+{X}_{X}^{s}}-j\frac{{X}_{s}}{{R}_{s}^{2}+{X}_{s}^{2}}\right)$

(4.146)

are shown in Fig. 4.36

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