Soundtrack Analysis on Jaws

Jaws is a 1975 American thriller directed by Steven Spielberg. It is about a giant man eating shark who attacks beachgoers on Amity Island, a fictional summer resort town. The film was mostly shot at Martha's Vineyard, Massachusetts.
The clip I am using from this film is when Hooper goes into the sea in a scuba kit while enclosed in a shark proof cage after he as well as Quint and Brody.

In this scene the director uses Diegetic sound (this is the sound that the character will hear in the scene, For example the bubbles he blows when he is in contact with the shark) as well as non-diegetic sound (sound that the viewer can hear but the character cannot) as you hear the screams of Hooper and the 'crash' of the shark hitting the cage as he is trying to attack.
You also have the mood music in the background. Non-Diegetic sound is used to make the scene better for the viewer to watch and to often tell the viewer what to think during that scene.

The shark in this scene has its own Leitmotif (soundtrack that goes with a character) or his own music which is low pitched, this can also can been seen as the ambience as it is setting the mood for the scene. This tells the viewer that the shark is turning up. As he gets nearer or further away from his intended target the amplitude (the volume in the scene) of the scene changes (goes from quiet to loud) to make it more dramatic, this entices the imagination of the as they viewer imagine the potential outcomes of what might happen and encourages them to keep watching to find out, when the shark attacks the pitch goes from low to high.

Another thing demonstrated in this scene is the Dissonance (sound that you don't want to hear or is not pleasant) of it as there are notes that don't go together in it, this makes the viewer stay on the edge of their seat as it creates a lot of tension amongst the scene. There is no consonance (sound that you want to hear or is pleasant on the ears) in the scene which makes this part of the film tell the viewer what to think and to feel slightly on edge because the shark hasn't gone away yet.

I think there is a lot of Foley (sound that is made in a studio and then added into the clip) in the scene as you generally can't hear sound under water. So when the shark hits the cage you lose that sense of realism which ruins it in a way but also keeps the viewer interested because if there was no sound at this part it would just be boring!

Within the first minute there is both are two different types of cuts. One is a J-cut  (where you here the sound before the clip) which is used as the shark approaches Hooper in the cage; you hear the audio but it changes clip quickly. At the end of the minute we see an L-cut because as the shark goes away and the audio fades the clip changes again to get the reaction of Hooper thinking he has got away with seeing the shark.
When the shark does go to attack Hooper in the cage we get a sense of fight or flight (a part in a film where we don't know what is going to happen next) as we don't know until slightly later whether he will stay and fight the shark or instead try and swim away.

Overall there are a lot of different techniques in this clip which make it more enjoyable to watch and keeps the viewer watching. It is a bit unrealistic but that is what makes a film better to watch as they often push the boundaries.