p0 1[atm] "Ambient pressure"
T0 25[degC] "Ambient temperature"
relH 0.5 "Relative humidity"
f0 10[kHz] "Maximum frequency"
dvisc0 0.22[mm]*sqrt(100[Hz]/100[Hz]) "Boundary layer thickness at 100 Hz"
dvisc 0.22[mm]*sqrt(100[Hz]/f0) "Boundary layer thickness at f0"
dn 1[um] "Piston max displacement"