Seahawks fans officially set the record for the having the loudest stadium during a September 15 game against the rival San Francisco 49ers. The decibel reading taken during a sack of San Francisco quarterback Colin Kaepernick in the first quarter - following a one hour weather delay - was 131.9 decibels.
The crowd later bested the mark with a reading of 136.6 decibels after a third quarter interception.
That record was short lived, and the Kansas City Chiefs can rightfully claim Arrowhead Stadium is the loudest stadium in the NFL. The Chiefs broke the world record for an outdoor sports stadium in their 24-7 win over Oakland on October 13 when they reached 137.5 decibels in the closing minutes.
The Seahawks group, called Volume 12, announced this week they had invited officials from Guinness World Records to CenturyLink Field for a second attempt at the record.
"Seahawk fans aren't spectators, they are an extra element to the home field advantage. They actually participate by creating a hostile environment for the opposing teams with sound and energy," Volume 12 organizer and former Seahawk Joe Tafoya said in a news release announcing the attempt.
Fans at Monday night's game can pick-up complimentary ear plugs at all guest-service locations