Dialects Changing, But Not Disappearing In Philadelphia : NPR

Researchers at the University of Pennsylvania are tracking changes in the Philadelphia accent. Reporter Zack Seward dips into archives that include more than a century’s worth of Philly natives. The researchers say most regional accents are alive and well, even in the digital age, but they’re always changing.

http://www.npr.org/2013/04/05/176368267/dialects-changing-but-not-disappearing-in-philadelphia