When I was a kid, I could hear the capacitors in old CRT's. A room full of monitors would give me a headache. As I got older, my hearing has decreased in the high pitch ranges. That, and monitors have gotten a lot better.
I was able to do that too, I think most children are - it just makes Hearing is much more acute before the bombardment of loud music and the natural decline in the acuteness of ones hearing.
And it should be the law: If you use the word `paradigm' without knowing what the dictionary says it means, you go to jail. No exceptions. -- David Jones