According to the American Council of the Blind, "audio description Audio Description involves the accessibility of the visual images of theater, television, movies, and other art forms for people who are blind, have low vision, or who are otherwise visually impaired.  It is a narration service (provided at no additional charge to the patron) that attempts to describe what the sighted person takes for granted -- those images that a person who is blind or visually impaired formerly could only experience through the whispered asides from a sighted companion."  - ACB.org