 This noise has caused problems for opposing teams, causing them to commit numerous false-start penalties.From 2002 through 2012, there have been 143 false-start penalties on visiting teams in Seattle, second only to the Minnesota Vikings.The Seahawks' fans have twice set the Guinness World Record for the loudest crowd noise at a sporting event, first on September 15, 2013, registering 136.6 dB during a game against the San Francisco 49ers and again on December 2, 2013, during a Monday Night Football game against the New Orleans Saints, with a roar of 137.6 dB.