MasksLaryngeal MasksRespiratory Protective DevicesIntubation, IntratrachealPerceptual MaskingAir PressureManikinsEquipment DesignDisposable EquipmentFiber Optic TechnologyAnesthesia, GeneralPositive-Pressure RespirationLaryngoscopyRespiration, ArtificialCricoid CartilageAirway ObstructionRespiratory InsufficiencyDramaAnesthesia, InhalationTidal VolumeOxygen Inhalation TherapyInhalation SpacersProtective ClothingContrast SensitivitySensory ThresholdsNoninvasive VentilationPharyngitisLaryngismusAerosolsPsychophysicsLarynxNeuromuscular BlockadeIntermittent Positive-Pressure VentilationEye Protective DevicesVentilators, MechanicalAnesthesiaPressureEpiglottisIntubationNebulizers and VaporizersPhotic StimulationCross-Over StudiesAirway ManagementPattern Recognition, VisualSubliminal StimulationPneumonia, AspirationImmobilizationContinuous Positive Airway PressureInfectious Disease Transmission, Patient-to-Professional