History of Philadelphia vowels
Language Log 2013-03-29
Summary:
A couple of days ago, Joe Fruehwald and Bill Labov were on WHYY, the local public television station, in a NewsWorks Tonight segment about "How the Philly accent is changing". The text version on the newsworks.org web site is nicely presented, with illustrative inline sound clips. You should read (and listen to) the whole thing!