It amplifies the noise the fans make and artificially increases the level over what the noise would be in a “ normal “ stadium. And it’s an advantage to the home team because the fans are not morons and quiet down when the Seahawks are on offense and increase their noise when the other team is on offense. You don’t watch football much do you?
I watch TONS of football so your sad attempt at well poisoning fails. Meanwhile in the land of facts this isn’t any different than the guy in charge of the jumbotron putting the “get loud” on the screen. Noise is noise, the home team likes noise, the away team doesn’t. So what if 14 years ago they decided to use some architectural tricks to keep the crowd noise in the building, both teams have to deal with the noise, their defense is on the field and having communication hampered just as much as the opposing offense.