Actually, many studies have proven that the mind can interpret somewhere between (depending on the individual) 220Hz-260Hz before not being able to distinguish anything higher at all. You might want to check your facts. These studies are very important to the future of games, as we need to be able to create a more immersive experience for virtual reality. Our eyes work a bit more on the digital side, mathematically and theoretically being able to observe the world in around 18000p (eighteen thousand progressive scale), whereas our mind works very similar to analog technology, but not quite