What word describes something that is rough-sounding and boisterous?

The word that describes something that is rough-sounding and boisterous is "raucous." This term is often used to characterize loud, harsh, and disorderly sounds or behavior. For instance, raucous laughter in a lively crowd reflects a spirited atmosphere that can be both engaging and chaotic.

Raucous is particularly fitting because it conveys not just loudness but also a certain unruliness, capturing the idea of noise that is disruptive or attention-grabbing, which aligns perfectly with the description provided in the question.