It’s one of those hacker’s dreams; good in theory but hard to put into practice. Stories abounded long ago I remember of “the one guy” whose hearing and analysis were so acute he could discern passwords from across the room, although it’s more likely a mirror or even more likely just lifted up the keyboard when nobody was looking and saw the piece of paper the person wrote the passwords on.

It’s one of those hacker’s dreams; good in theory but hard to put into practice.
Stories abounded long ago I remember of “the one guy” whose hearing and analysis were so acute he could discern passwords from across the room, although it’s more likely a mirror or even more likely just lifted up the keyboard when nobody was looking and saw the piece of paper the person wrote the passwords on.