Stall warniing systems
Just for some info, the stall warning system (Stick shaker), looks at Aircraft Speed, Angle of attack and Flap position and also engine speed and flight status. All these parameters are monitored by a stall warning computer, if the correct combination is monitored, then the stick shaker will operate. These could be, low airspeed or high angle of attack with incorrect flap setting.
The point at which the warning occurs is also influenced by engine speed, airspeed, and any asymmetry between leading edge and trailing edge flaps.
The AOA sensor monitors 'relative' airflow, so with a high nos attitude at slower speeds the AOA will be high, but at higher speeds such as climbout it will be less. It is just like a weather vane.
Hope this helps.