>>mikece+(OP)
I'm not clear why people are poo-pooing this as if it's not a big deal. From a security and espionage point of view this is pretty significant - the audio learning has got to the point that a sensitive audio bug can bascially be key logger. There are a ton of context where an audio tap would be much easier to get in place than a traditional network attack (and with modern shotgun mics, might not even require being in the building). That is applicable to much more than just password stealing.
I've always been a bit fascinated by this attack vector and wondered if would get to this point.