NFLSTATS QUOTE:
The bird lovers @ Advanced Stats obviously never been to a Seahawk game in the last 10 years where noise level does not go down as the game proceeds.
Some recent research looked at when HFA manifests itself in games. In the NBA, HFA (or HCA rather) is strongest in the beginning of the game and then diminishes as it goes on. I found the same phenomenon in the NFL.
The bird lovers @ Advanced Stats obviously never been to a Seahawk game in the last 10 years where noise level does not go down as the game proceeds.