What is "crescendos"

Usage examples of "crescendos".

He had two baritones, three tenors, a bass, and a countertenor who was much mocked on account of having to sing all the women's parts, and the idea was that each man should expel either a turd or a fart during the crescendos, when they could not be heard above the singing.

Martial music, drums and trumpets predominating, swelling to crescendos that Bourne could only imagine were deafening within the echoing confines of the huge structure.

Behind them there came a succession of crescendos as the frenzied cheers mounted.