sound in films - research

Sound in films has developed over time from silent movies movies with music playing to full blown action movies with dialogue, music, sound effects and more.
There are many different types of sound in movies such as ambient sound (birds,traffic), diagetic sound (dialogue, footsteps) and non diagetic sound (music).
In thiller movies there is a high use of all these different types of sounds.
Sounds can be used to create different emotions within the audience such as suspence, happiness and anger.
For example a lack of music (non diegetic) and only a very small amount of ambient sound (such as a bird) can give the impression of being deserted, isolated and alone.
Music plays a big part in movies to control the emotion that the audience is feeling when watching the film. For example in a happy moment in the film very loud, upbeat music playing will also make the audience feel happy. Whereas a soft piece of music in the minor key can play a big part in thriller films as it gives the impression of fear and foreboding in the audience.
The volume and tempo of the music can also create emotions within the audience and in thriller films the use of increasing volume and tempo creates suspence in the audience and leads them into certain events happening within the film.

The use of sound bridges is also very useful in thriller films as it links two scenes together showing the audience that they are related or happening at the same time.Sound bridges could be with any type of sound including music, dialogue or ambient sound.
Sound bridges are often used in the openings of thriller films when there are lots of establishing shots and shots which may not nessasarilly mean anything to the audience this early in the film.