I have lost all urge to watch the NFL, but for the fake noise, I have listened to games football , baseball on the radio where the crowd was not big or loud enough to be heard on the broadcast.
I is annoyingly awful.
The broadcasters have to either talk without ceasing, regardless of the babble or you think you have lost the signal or it is sooo, boring you change the channel.
I am glad baseball is using it.
On the games I have seen , listened to, they do not put huge cheers for he home team over the opposing team, at most just a brief bit of more enthusiast cheering.