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 ...

HiDPI or 3840×2160 @ 60 Hz, depending on whether or not you chose to use a Scaled resolution in System Preferences → Displays. You can also use the famous “UFO Test” to ensure your display ...