Seattle’s CenturyLink Stadium can easily boast being the LOUDEST stadium on the planet Earth - any maybe in the galaxy! Architect Joe Niemuth was specifically required to design the stadium so that it would retain crowd noise. He succeeded by creating a roof that uses big curved parabolas, (Yes, math geeks, parabolas), which results in 70% of the stadium being covered. He used this design because he knew that sound dissipates in open air. To make it even rouwdier, he built the seating in a bowl-like shape that naturally deflects the sound inward. The result: when the fans cheer, it is deafening!