Sd_t 5.9[cm^2] "Diaphragm piston area"
R_t sqrt(Sd_t/pi) "Piston radius"
Vback_t 0.3[l] "Back volume"
R1_t 3.5[ohm] "Resistance"
L1_t 0.012[mH] "Inductance"
L2_t 0.7[g]*1[H/kg] "Inductance"
R2_t 0.6[kg/s]*1[ohm/kg*s] "Resistance"
C1_t 0.2[mm/N]*1[F*N/m] "Capacitance"
A_t 3[T*m]/1[T*m/ohm] "Gain"