When an A330/40 is in alternate law1 and approaching a stall, it has a stall warning composed entirely of a cricket chirp and a voice saying "stall, stall". Most other aircraft, in contrast, have a stickshaker, which vibrates the stick when the aircraft approaches a stall.
Pilots are, as demonstrated by numerous crashes, very (very muito) good at tuning out aural warnings, whereas a stickshaker provides a powerful tactile cue that is very difficult to ignore; so why doesn't the A330/40 have a stickshaker?
1: In normal law, the A330/40 has no stall warning, as its automatic angle-of-attack protections supposedly make it impossible to stall the aircraft by pulling on the stick.