Tuning of AOA Protections at High Mach Number

On large aircraft, in clean configuration and high altitude, when the angle of attack increases some buffeting appears and intensifies up to a point it becomes a deterrent for the flight crew.
This defines the limit angle of attack of the flight domain, which decreases when the Mach number increases.
This video shows how the flight tests allow tuning the angle of attack protections in normal law to ensure maximum maneuverability while still being protected.