HYPER REALISTIC SOUND
Hyper realistic sound is when you hear a sound in a film that is unrealisticly louder than normal. eg a text message in a crowd. This is used to emphasise important parts from the film.
In the casino royale clip, at the very start, the agent in in the middle of a big crowd and everyone is cheering and shouting. the agent receives a text message and you can still hear his message tone go off even when he is among the crowd of people. This shows that text message is an important and relevant part of the scene otherwise it would seem insignificant and in the background. The producer has purposely made sure its unrealistically loud so as it catches the audiences attention.