If this has been discussed before, my apologies I could not find a thread on it. As we have seen crowd noise seems to be a huge factor for Seattle's success at home. I have noticed Seattle fans are extremely loud throughout the game when their D is on the field. From the point the other team is in the huddle to the end of the play. I'm not looking past any team the 49ers play, but I think one of the keys for the the 49ers or any team for that matter to not have so much difficulty with crowd noise in Seattle, especially in the playoffs, is to simplify or shorten the playcalls in the huddle. Maybe even use hand signals.