I rewatched the game last night and noticed several times guys on defense trying to yell something to a teammate and the teammate was noticeably having a hard time hearing because of the crowd noise. I know Michigan Stadium isn't known for being the loudest place to play, but even so, I was wondering would it be better if we collectively kept quiet while the defense was trying to align.
Hurry up teams don't really rely on voice communication and since they're almost always in shotgun, there isn't really a snap count to hear so crowd noise doesn't really hurt them. In fact, most of the really rushed plays were probably called prior to the play before, so there's really no communication at all.
I realize this would be hard to do in practice since it goes against long standing tradition and habits, but could it be helpful?