Hitchcock uses sound to portray the events happening in the shower scene, when the killer faces Marion the music is high pitched and frantic capturing pain of Marion being stabbed. Tension is also created is by making the audience calm before the attack. Marion enters the shower and the music stops leaving just general noise and the shower, which creates tension leaving the audience to wait. Using shrilling string instruments clashing to create suspense and tension in the film. The soundtrack is repetitive and gives a sense of anticipation throughout the film.
