How are generic elements and camera angles used to create suspense in the attic scene of The Exorcist?

In the attic scene of The Exorcist, the director creates tension by not using music which makes the watcher listen out for any movement and keeps them intrigued. In the scene, nothing bad happens straight away, instead the director drags out the scene to create suspension and so when something happens it isn't expected. The victim in the scene is a stereo-typical young woman who is vulnerable and scared who is also isolated and on her own, this gives the impression that something or someone is going to get her. Making the scene dark and in the middle of the night with only a candle for light links with the no music, as you can't see much in the attic so you are relying on sound to give you clues as to what is in the attic and the candle creates shadows around the room which puts thoughts in your mind as to what may occur. The title of the films gives away what it is about and what will happen. The use of camera angles add to the suspension because it showed portrait views which showed the fear on the victims face and there is an upwards shot view when the woman is walking up the stairs as it makes it look as if someone is watching her as it happens and makes her look weak. As well as this, she is also filmed from behind to make her look like she is being followed. The camera films her from behind objects to give the suggestion that something is watching her movements. A low camera shot when the woman walks through the door makes it look as if she knows what she is doing and that she is in charge but she is really trapped and in danger when she goes up into the attic.