Several posters and the 'report', have made reference to the "blaring gear horn".
Recognition of the aural Stall Warning on AF447 was investigated and is the subject of further investigation by EASA.
Quoting from Flightglobal
AF447 inquiry grapples with stall-warning enigma
It cites cognitive research suggesting that visual, rather than auditory, information is prioritised by pilots coping with high workloads.
"Piloting, calling heavily on visual activity, could lead pilots to a type of auditory insensitivity to the appearance of aural warnings that are rare and in contradiction with cockpit information," the analysis says
Perhaps the warning horn was not as distracting as some may think, as in the case of AF447, where the crew did not comment on the repetitive "stall stall" warning.
The human brain is an amazing thing.