I know the annoying buzz of the bearings going on a fan, but to be honest I'm no better than the users at hearing things. I just know what they meant when the hear it after everybody else does.
My personal favourite party trick is ordering replacement fluorescent tubes when they are on their way out by the flickering, though I am quite also quite good at detecting the smells of components (or multi way sockets running a couple of 3kw heaters) melting.
Some people will tell you that they can't smell, hear or see such things. Those people are actually right. They can't. We can though. However chaps, it's not actually down to a lifetime in IT.
You were born with it, basically. Your likely just beyond the fringes of what is currently designated the Autistic Spectrum, because you don't have much in the way of disadvantages, but you likely do have the ability to make use of positive traits many people don't have, which might include heightened levels (out of the norm for >95% of the population) of one or more of the following abilities:-
Logical thinking ability
IMO, you'll find many such people can be found in technical/engineering disciplines since it's self selecting and we have a decisive advantage over people without such abilities.