Diegetic/Non-Diegetic Sound in Horror Trailers

A crucial section we need to cover in order to produce successful horror trailers is the diegetic or non-diegetic sound in horror trailer. The sound in films helps create an atmosphere for the audience and to make scenes in films seem more realistic, especially in horror films. In the lesson we had to identify the diegetic and non-diegetic sound from a clip. At the end we were told the sound from 'House at the End of the Street' (2012). This is what I identified in this clip:

NON-DIEGETIC:

Harsh. screeching sound
Music in time with tempo, pace and rhythm of the cuts
Heartbeat-like, thumping sound
Out of tune music- dissonant- pads- constant droning noise- drone
Coventional sound effects of smashing, slashing, slicing sounds suggest murder weapons
Calm, quite moments then transitions to loud, intense music
Rewinding effect
Dissonant, unstable, harsh and unpleasant music

So many different non-diegetic sounds were playing in this 2 minute clip that it will be hard to identify after one viewing. The non-diegetic sounds intensify the trailer making it more heart pounding, stressful and adrenaline rushing which is what a conventional horror trailer is suppose to do. Once you experience this type of adrenaline you want to go see the film.

DIEGETIC:

First line: 'Oh My God'
Shattered glass
Clock ticking
Creaking doors, slamming, knocking, ringing door bells
Screaming and shouting
Protagonist being dragged
Exaggerated thunder, stormy sound weather
Creaking floorboards
Whispering voices
Burning
Re-appearing metallic sounds of blades
Paranormal sounds
Last line: 'I think this place is really good for us'