"Again, this logic suggests that our audible ability is so poor we couldn’t tell the difference. But it’s been shown our hearing is highly acute."I think there are machines that than sense sounds a human cannot. Of course, not every microphone, or whatever is used, will be that good but some are. Also, not every hearing is the same.
When it comes to cables, many tools can figure out, let' say, 1V going through it. I wonder how many humans can sense it when holding that cable. Humans are highly sophisticated in some areas, but machines are getting ahead in some of the other ones.