In a thriller film, the sound is more dramatic and goes according to the characters. Non-diegetic dramatic music creates tension for both the film and audience, making viewers wonder what will happen next. There are several genre signifiers in thriller films, including diegetic sounds like heavy breathing and footsteps that build suspense, as well as enigma codes and voiceovers that keep the audience guessing about the story. Most thriller film characters are older men or women and the films are aimed at audiences aged 16 and up.