How do our eyes determine whether something isn’t real or not better than our ears?

Question

For example, when I see the CGI of a movie, I can almost always tell whether it’s CGI or not

But when it comes to hearing sound effects, it’s a different story

While I’ve never heard of the sound effects of an IRL instance of this example, I was shocked to find out that the sound effect of someone’s bones being broken in violent movies/games is actually just the sound of a guy ripping apart a cabbage

In: 3

Answer 1

1. because its much easier to get realistic sound than realistic graphics as most sounds are recorded from real life.

2. because you usually don’t hear the sounds in movies in your daily life, so if they are a bit off you won’t know.
if you, for example, listen to all kinds of explosions daily then watch a movie with mismatched/slightly off explosion sounds you might be able to pick up on it.