Further along the exhaust pipe, the exhaust pressure wave encounters a converging conical section, and this reflects a "positive" pressure wave back up the pipe.
Rapid rises in property taxes tend to cause seniors and empty-nesters to sell their existing homes to families with children, which led to further increases to the school-age population.
The upgrades included an enlarged canopy soffit (the largest in baseball), protecting fans further from the elements despite the stadium not having a roof.