Think you have golden ears? Then answer me this: How is it possible that this tone ascends in pitch endlessly without passing the threshold of human hearing? The answer is actually mind-blowingly simple: The pitch NEVER actually ascends. You have to hear this audio illusion.
Stop robocalls for good with Kim’s eBook
Robocalls interrupt us constantly and scam Americans out of millions of dollars every year. Learn Kim's best tricks for stopping annoying robocalls in this handy guide.