The document discusses three types of sound used in films: diegetic sound, non-diegetic sound, and Foley sound effects. Diegetic sound comes from within the scene, like music playing on a radio. Non-diegetic sound only the audience can hear, like soundtrack music used to build tension. Foley sound effects are everyday sounds added in post-production to make scenes more realistic, like using cornstarch to mimic the sound of snow crunching.

1. Sound

2. Diegetic sound
Skyfall - Certain Kind of Woman
http://www.youtube.com/watch?v=KnlsoaZ5xMo
Diegetic sound are sounds that are naturally heard within a scene such as
radio, voices, general sounds that occur (like glass, crunching etc).
The sound in the clip (such as the background music and the ambient
restaurant sounds) sets the scenes mood as being very relaxed and informal at
the bar. The way the actors speak enables us to identify their character and
personality and their attitude toward each other, and we can interpret the
relationship between them from the sound alone.

3. Non – diegetic sound
Skyfall - Motorbike Chase
http://www.youtube.com/watch?v=13DQS1AHdXg
Non-diegetic sound is the sound that only the audience can hear, such as the
soundtrack. It is specifically placed into particular scenes where it is most
appropriate to create the atmosphere.
In this example of the chase scene, the orchestral music creates tension
throughout the chase and adds a sense of thrill in the chase. Without
music, the chase would be boring and would seem like a drag. There wouldn’t
be much within the scene to keep you interested if there was no music
involved.

4. Foley sound effects
Foley sound example & explanation
http://youtu.be/OONaPcZ4EAs?t=1m3s
Foley sound is the reproduction of everyday sound effects that are added in
post production. Their purpose is to make films more realistic and add
ambient sounds to a otherwise silent & uninteresting film. They are often
sounds that are difficult to produce to begin with (such as cutting off a
limb, bullet penetrations, etc).
Examples of the use of Foley sound would be:
• Corn starch in a leather pouch makes the sound of snow crunching.
• A pair of gloves sounding like a bird flapping.
• Frozen romaine lettuce makes bone or head injury noises.