(From PJ)
The FWC [Flight Warning Computer] activates the audible stall warning. All other aural warnings are inhibited if a stall warning is in progress.
Design point to consider with this in mind: if airspeed is unreliable, or if AoA is on the fritz, other warnings (engines, for example, if icing is the condition driving airspeed awry) would be useful and even necessary. Establishing a heirarchy makes sense if you are to avoid sensory overload in the cockpit.