This auditory illusion is called a binaural beat. For example, if a person hears a tone of 405 Hz in one ear and a tone of 415 Hz in the other, they would be hearing a binaural beat with a ...

Netflix has a range of hidden test screens ... In this example, we will be using Season 2: Episode 8, which is for a 1080p (Full HD) 60 fps (equivalent to a 60 Hz) television.