Sound is used in thriller movies to create tension for the audience. Tension keeps audiences engaged by building suspense about what might happen. Sound contributes to tension through elements like rhythm, pitch, volume, and pace of music or ambient noise. Quickly paced scores with an increasing volume can raise heart rates and put audiences on the edge of their seats. Conversely, moments of silence or calm music before an increase in sound can also create tension. Examples from films like Skyfall and The Shining demonstrate how modifications to the sound design heighten tension in key scenes.