In some situations, during the test the patient will have to ignore the signal sent to one ear while focusing on the signal perceived by the other ear. This happens thanks to binaural separation: our hearing perceives the direction and position of sound, differentiating the time and intensity of the sounds that reach each ear. These differences are processed by the brain to determine the position of sounds in space. It is a phenomenon that is fundamental to the perception of direction and it is used in advanced audio technologies and hearing tests.