sound effects are used in almost every film production it is used because you can't fire guns in empty spaces or get the sound of a plane going down how would you even record that you could use a microphone to record these things as its more cost effective not to. so sound effects are sometimes even improvised such as the sound of an spaceship and because a spaceship has a different sound from anything as its not reel but others argue they are but nobody knows the sound of a spaceship but because its mystical and different they came up with the sound what was like a short laser sound like.
an example would be instead of beating people up in a fight scene they use people punching lettuce and various other objects to make it sound like somebody getting beaten up in a fight scene or even an other example would be in cartoons when somebody's teeth gets knocked out normally it is the sound of glass shattering this is called foley recording for something but getting the sound by using your imagination.
an example of sound effects been successfully would be the new film movie pixar called WALLE this was successful because they based the film on basically sound effects and there is little voice tracks.
going back to walle hear is a video explaining the reason why walle was so successful and if the film was produced earlier it wouldn't of been as successful as it was.
walle was very effective as you hardly get any human voices in it and the main character in walle is a robot and communicates by using sci-fi noises which shows this was a success of a project as you still understood the emotions of walle without him speaking any language but only using sound effects.
foley is a behind the scene noise what covers in films an example would be when somebody has a fight scene and uses the sound of a punch as punching some one punching vegetables and breaking bones as snapping frozen celery.
this is important as you won't need to actually break some actors bones and also it is important because it is effective and makes very good noise and can be good examples.
temp tracks are used before an actual track to sometimes even set the mood for the scene but also get an idea and a feel for what should be said and also it gives a chance for the actors to get there mind set on how things should be said and so on.
an example would be the pirates and the Caribbean video as they tried a lot of temp tracks to see which one suited the film best because it "needs to match the story/narrative "
its contribution to success would be if they didn't uses different temp tracks they wouldn't get a feel of the narrative of the film hear is an example.
https://www.youtube.com/watch?v=rn9V0cN4NWs
Voice tracks is more of "ADR" automatic dialogue replacement which is when actors are doing the voices for the films a good example would be an animated films as they are animated characters but are still using the voices of famous actors such as films like Madagascar.
Actors like Chris rock and Ben stiller doing the voices of the lion and the zebra in the film Madagascar a good piece of advice in this is when you are recording they need to get all dramatic in front of a microphone not only just on stage but they also watch the characters without the voices and see how they act to see how they would suit the characters.
not only in animated films they are used but they are also used in action scenes or in other scenes such as real life factors and in some cases in real life situations. hear is a good example of describing voice tracks and ADR.
http://vimeo.com/81231633
