Hi Hue,
Not sure if I know what "loud" means in this context, but here are a few thoughts:
1. Use action verbs, rather than non-action verbs ("to be" verbs).
2. Use onomatopoeia.
3. Make the action escalate. Have your character do ridiculous, outrageous things (maybe to try to solve her problem). Or put her in outrageous, ridiculous settings.
4. Use more dialogue than narration.
5. Intersperse short sentences with long ones. Sentence fragments are okay, too.
6. If your book is a "quiet" book by nature--say about the death of a loved one or some other heavy topic--make it stand out in some other way by use of another hook, an interesting character, a new way to look at the subject, a different setting, etc, to make it more "loud."
Jody