However, what sets Centurylink apart from other stadiums is the noise level it can generate during games. Seahawks fans are known as the "Twelfth Man" for their help in distracting visiting teams with their noise, and the results have been well-documented. In fact, the Guinness Book of World Records verified that on December 2, 2013 fans at the NFL game between the Seahawks and New Orleans Saints established a new record for the loudest roar at an outdoor stadium, registering an unbelievable 137.6 decibels.
The design of Centurylink makes it unique compared to other NFL stadiums. For example, its site is the smallest of any ever considered for an NFL stadium. Being located in the business district, while in many ways a positive, was at first seen as a negative for the stadium design. However, by cantilevering the upper levels over the lower ones, the space was adequate. The angling and strategic placement of seating also led to the stadium's popularity with fans, as did the U-shaped configuration that contributes to the extreme noise that can be generated. The stadium also boasts a vertical scoreboard, a first in the NFL, and luxury boxes located at field level.
While the Seahawks are the main tenants of the stadium, various college and high school games are played there as well. However, while home teams love playing there, visitors are less than enthused. While crowd noise is always a factor, the stadium's proximity to Puget Sound makes it difficult for kickers to have much success due to the strong winds and the moisture in the air. In addition, fans sometimes get so rowdy that the stadium actually shakes. Seismograph readings from sensors placed around the stadium have actually recorded results similar to seismic tremors, with these results usually occurring after a Seahawks player has scored a touchdown in a playoff game.
With its unique location and reputation for crowd noise, Centurylink Field has become known for being one of the most interesting sports stadiums in the United States. For fans who plan to attend a game there, rest assured there will be a whole lotta shakin' going on.