Clown Train used sound in a clever way I found, and rather than trying to create a rich soundscape, opted to use sounds in the least way possible to maximse the impact they had. Of what I can remember the sound of the lights flickering amongst a bare soundscape and going out was a particularly good effect. Of course, lights rarely make sounds like that when turning on and off, but the sound enhanced the sudden contrast of light to dark in the train carriage.

Horror seems like the biggest influence for this film. The jump scare technique usually relies on sound in a similar way where a victim lurks in silence, frightened, until a monster or the villain jumps out from the shadows accompanied by sudden, loud soundtracks or sound effects to enhance the visual effect.