Moreover, sound is used in Blackmail to emphasis the inner emotions of a character by presenting a close-up to the character's facial expression with another character's exaggerated voice. The knife scene is a good example, where Alice feels panic and guilty after she kills the man, she is affected by everything that is related to the scene of the crime in her imagination. Therefore, when the neighbor gossips about the crime, the film presents a still image of Alice's face and every time when Alice hears the word "knife", there are some twitches on her face. More importantly, the sound volume of the word knife becomes louder each time, whereas the other parts of the conversation are almost muted. At that point, the voice of the neighbor does