This document discusses key concepts about sound in TV dramas. It explains that diegetic sounds are those that characters can hear or see within the world of the story, while non-diegetic sounds are only heard by the audience. Students are instructed to analyze the sounds in a sample video sequence from the TV show "24" by categorizing different sounds and noting how sound works to generate meaning in terms of narrative, genre, and character. The document also discusses analyzing changes in sound levels and conducting a more detailed sound analysis of a TV drama sequence using relevant terminology.