Northeastern elite accent

A Northeastern elite accent is any of the related American English accents used by members of the wealthy Northeastern elite born in the 19th century and early 20th century, which share significant features with Eastern New England English and Received Pronunciation (RP), the standard British accent. The late 19th century first produced audio recordings of and general commentary about such accents used by affluent East Coast and Northern Americans, particularly those in New York and New England, sometimes directly associated with their education at private preparatory schools.

Source: Wikipedia — Northeastern elite accent (CC BY-SA 4.0)