Sound in Psychological thrillers

A common aspect with psycho-thrillers is the involvement of sound/ music in order to emphasise the atmosphere and build tension. 

In addition to this audio is majorly significant in creating a  sense of foreboding and a sound motif such as danger. 

Another thing I noticed is the use of non-diegetic sound which is played at a low volume such as in the "Green Room" trailer, specifically between 0:19-0:22 seconds.The pinging sound slowly reduced in volume and faded which had the effect of signalling an even that will cause trouble.

Likewise screams and loud noises are also commonly a feature within this genre to make shots more disturbing and dramatic yet in opposition to this silence is also used in order to make the audience feel uncomfortable.