According to Nozaic (2006) , non-diegetic sound is a sound that does not happen as a feature of the activity and can’t be heard by the film’s characters and can be heard by the audience. Non-diegetic sound, which incorporates music or voiceover, is largely dictated by important decisions and can significantly affect the tone of a film. Non-diegetic sounds consists of impersonal narration, music and sound effects. Impersonal narration in film is a story which is told by a voice which does not have a place with a character in the fiction, or to any storyteller incorporated with the fiction. Next is music, a non-diegetic music in a film is for the most part referred to as the score or soundtrack that are added into the film externally to give the film a state of mind and emotion. The term score is instrumental ambient melodies that are produced by a group of orchestra, while soundtrack is the lyrical music that are being used in the film itself. The music is accompanying the scene however it is not originating from the genuine scene in camera. Sound effects in non-diegetic sound is a sound that is included after the shooting stops (post-production) . Sound effects can likewise be called as foley effects. Foley effects are named after a sound designer from the United States whom is Jack Foley. For instance , sounds like foot steps, ceramics clunking, paper folding, punches hitting, glass breaking, garments stirring, doors opening and slamming were recorded and made in a studio to improve the current ambient sounds in the scene.
Nozaic C. (2006). An introduction to audio post-production for film. (Unpublished degree’s thesis). University of Stellenbosch, Cape Town, South Africa.