True NFL fan experience is going to be rare in 2020 - The Boston Globe
Chiefs fans reclaim stadium noise record from Seattle
Arrowhead Stadium - Wikipedia
Arrowhead Stadium breaks record for noise level - The San Diego Union-Tribune
Is Kansas City Chiefs' Arrowhead Stadium the Loudest in the NFL?
Kansas City Chiefs fans set crowd noise world record on Monday Night Football - Sports Illustrated
Arrowhead Stadium as the NFL's 2nd best atmosphere, according to Seatgeek
Arrowhead Stadium Will Challenge No-Huddle