The Great American Vowel Shift

[Steve H]

The original great vowel shift was a series of changes in how English is pronounced that took place between the 14th and 16th Centuries - Chaucer would have heard the beginning of it, Shakespeare the end. https://en.wikipedia.org/wiki/Great_Vowel_Shift
Modern American dramas suggest that another gvs is happening over there, perhaps manly in New York: short o is changing to short a ("hat dag"); short a to long e ("hat" becomes "heat") and long e to I know not what. Anyone else noticed this??

[Nearly Sane]

Can't say I have noticed it but I would suspect that such changes would be much more likely with greater mobility, and mass communication. The change in accent, and vowels of someone like the late Queen Elizabeth is obvious when you hear recordings over time.