[zenlibs]

While the attack is technically feasible, complexity and sophistication do not lend this to wide deployment. Someone with a lot of time, money and drive (think heist movie, or spy agency) to hack a person of interest might find this attack viable, assuming they find a line of sight to the mic. But if one's dealing with determined hackers, there is likely a multitude of other lower hanging fruit to first pick off.

[darzu]

Hacks always start as "infeasible". But eventually the technique is refined and there's a kit for $20 that can let anyone do it by following simple instructions.