As the stall worsened, the aircraft's airspeed bled away and it began to descend, the angle of attack increasing to 41.5° before the airspeed fell below 60kt and the angle of attack became "non-computed data" - an invalidation which shut off the stall alarm.
In the 75s following the shut-off, however, the stall warning sounded another eight times as the angle of attack data briefly became valid again, each time at values from 38-43°, as the airspeed fluctuated with the aircraft's attitude.
Airbus clashes with pilots over AF447 alarm
Sidestick fwd - stall warning
Sidestick aft - no stall warning........
Great design
