Brian Smith, one of the leading computer scientists at Columbia University, not without reason believes that existing video games for the visually impaired gamers leave much to be desired. However, he did not limit himself to criticism and developed an audio interface RAD (racing auditory display), which, he claims, can be integrated into almost any racing game.
RAD uses two auditory control systems that the player perceives through normal headphones. One "sound slider" (characteristic tone) indicates the speed and trajectory of the vehicle, and the other uses directional sounds to warn players about upcoming turns on the track. Unlike some games designed for the blind, RAD does not overwhelm players with a lot of information, nor does it distract them from the game itself.
Brian Smith invited 15 volunteers to test RAD. As a result, they all preferred the interface offered by him to the game Mach 1, popular among blind gamers. Inspired by his success, Smith plans to further improve his brainchild, introducing additional game elements into it, in particular, races of several cars. He also intends to adapt his technology to other games as well.