dia_t 0.5[um] "Thickness of the diaphragm"
back_t 3[um] "Thickness of the MPP"
dia_r 200[um] "Diameter of the diaphragm"
gap 2[um] "Gap between the diaphragm and the MPP"
hole_r 3[um] "Hole radius"
vent_d 0.9*dia_r "Position of the vent holes"
vent_r 7[um] "Radius of the vent holes"
hole_dist 9*hole_r "Distance between holes"