Jump scares with sound.
What makes a sound scary?
I remember Steve Reichs ‘Come Out’ being used as a sinister accompaniment to a scene in the tv show Devs where the only sound was the piece. Repetition can be frightening.
Hauntology. Broadcast & The Focus Group.
Silence is like being submerged in darkness. Builds tension and leaves the imagination. Underneath is a scene from Under the Skin.
https://www.youtube.com/watch?v=4HeO10QoN5o
Cliched Waterphones and strings.
Not much of observation on sound, but, I find horror games are scarier than films due to interaction. When paired with visually disturbing thing images or scenes I think that silence is the most effective way to make the situation more frightening. In the audiobook of Steven Kings The Stand that I listened to last year, there is a chapter where the character Larry Underwood has to walk through the pitch-black 1.5 mile long Lincoln Tunnel that is littered with corpses. I remember this as being very tense and somewhat frightening, however this fear was not through sound but the narrative.