Actually, it's also been proven that not every human ear is the same. People hear things differently. I can absolutely hear the difference between basic "installer-grade" cable, and a pure single stranded speaker wire. It's also been "proven" the human eye can't see more than 60FPS, but I sure as heck can see the difference in my 144hz monitor... Let people believe what they want to believe. Last I checked, if someone believes they can hear something between two cables, it doesn't directly impact your life at all.