Why is the full face mask louder than the other masks?

AirMini / Masks

The F20 connector for AirMini does not incorporate the new diffuser vent technology found in the AirFit N20 connector and AirFit P10 for AirMini. This results in some patients finding the full face mask louder than the nasal and pillow masks. This perception of noise may be heightened by the proximity of the vents to the face when compared to the other masks.