I remember being on the field helping out with marketing stuff and guarding "Big Buzz", on the field it is a lot louder than in the stands. We don't have a huge stadium but the seats are close, even the upper East and West stands are a lot closer than most stadiums.
I was in the upper West for the first time and while the view was fine it did feel a bit muted, not nearly as loud as when I have sat in other parts of the stadium. Have not tried Upper North yet....
On the note about crowd noise with the offense, I can't remember if was the band or the PA but something got the crowd cheering. I guess we need a player video saying "Shhhhhhh"