The document discusses how sound is used in different television genres like crime drama, medical drama, sci-fi drama, and historical drama to convey information to audiences and create certain effects. In crime dramas, eerie music builds tension while screams and gunshots communicate danger and violence. Medical dramas use relaxing café music to ease tension versus a drumbeat that builds suspense. Sci-fi dramas employ mysterious sounds and machine noises to set a futuristic tone. Finally, historical dramas rely on period music, horse carriages and formal speech to transport audiences back in time.