My sound knowledge so far

Non-diegetic sound: The characters in the scene can't hear the sound or music - only the audience can hear it.

Diegetic sound: The characters in the scene can hear the sound or music - audience can also hear it.

Parallel sound: The sound directly matches the image on the screen 

Contrapuntal sound: The sound doesn't easily match the image on the screen.

Pleonastic sound: The sound is heightened to convey a point or so the audience can understand the situation.

Parallel and contrapuntal can also include - diegetic or non-diegetic sound (diegetic parallel sound - non-diegetic contrapuntal sound)

Silence is also used a lot to create many different atmosphere's and effects.