Iconic sounds connected with the genre
Over the years many different sounds have become associated with the genre of thriller as they are frequently used in different thriller films, for instance many iconic sounds are:

• The sound of footsteps getting louder as the antagonist gets closer
• Creaking doors
• Crows are often used as they are seen as a death omen, usually foreshadowing the chain of events that is going to happen
• Orchestral music is also used a lot as the calm sounds contrast with whatever is happening on screen. Making the film have a more eerie and ominous vibe.

After some clever films and carefully crafted musical pieces the music that plays have become iconic and people immediately recognise it with the film it came from. For instance in Jaws, John Williams' infamous piece played during the sharks appearance is immediately associated with sharks now.