Kansas City Chiefs fans' broke Seattle Seahawks' fans' record of having the loudest outdoor stadium by creating 142.2 decibels worth of noise at Arrowhead Stadium during a Monday night game on September 29, 2014.
By comparison, standing on an aircraft carrier has a noise level of 140 decibels. Standing 30 feet from a jet at take-off has a noise level of 150 decibels.