his voice breaking with relief

[Truth4vahid]

What does this sentence mean? I guess it's from Harry Potter book.
Specially what does "break with relief" mean?

"Harry!" Ron shouted, his voice breaking with relief "Harry, it's our car!"

 

[emsr2d2]

What does this sentence mean? I guess it's from one of the Harry Potter books. Specifically, what does "break with relief" mean?

"Harry!" Ron shouted, his voice breaking with relief "Harry, it's our car!"

Why are you guessing the source? You should know by now that you need to provide the actual source and author of anything you quote. Note that I have changed your thread title. Titles should include some/all of the words/phrases you are asking us about. Your question should appear only in the main body of the post.

The suggestion is that his voice, prior to this, was somewhat tense/worried. That tension was broken because he was relieved, presumably, to see the car.