I was at Brookie for our Sharks game and the noise was awesome, yet I later watched a Fox replay of the match and could scarcely hear the crowd. It was almost as though the crowd noise was deliberately muted, for what reason I don't know, but being an NRL-arranged fixture does tend to fuel my suspicions.
I was just having another watch of the game and a couple of times the volume breaks into what I've been used to all season. The one I just noticed is at about the 17 mins 33 secs to go mark (when Keppie get hits high) and just for a split second the sound bursts through at a much higher level. It did it before when Manly was about to take a goal line drop out.
so they definitely had the sound at a lower level than usual, I'm just not sure why.