William Labov in the context of University of Pennsylvania

In sociolinguistics, covert prestige is the high social prestige with which certain nonstandard languages or dialects are regarded within a speech community, though usually only by their own speakers. This is in contrast to the typical case of standard varieties holding widespread and often consciously acknowledged high prestige—that is, overt prestige—within a speech community.

The concept of covert prestige was first introduced by linguist William Labov, when he observed speakers preferring to use a nonstandard dialect, even though the speakers considered that dialect to be inferior. Labov proposed an explanation for the continued usage of the nonstandard dialect: to form a sense of group identity in informal speech situations.

North American English regional phonology is the study of variations in the pronunciation of spoken North American English (English of the United States and Canada)—what are commonly known simply as "regional accents". Though studies of regional dialects can be based on multiple characteristics, often including characteristics that are phonemic (sound-based, focusing on major word-differentiating patterns and structures in speech), phonetic (sound-based, focusing on any more exact and specific details of speech), lexical (vocabulary-based), and syntactic (grammar-based), this article focuses only on the former two items. North American English includes American English, which has several highly developed and distinct regional varieties, along with the closely related Canadian English, which is more homogeneous geographically. American English (especially Western dialects) and Canadian English have more in common with each other than with varieties of English outside North America.

The most recent work documenting and studying the phonology of North American English dialects as a whole is the 2006 Atlas of North American English (ANAE) by William Labov, Sharon Ash, and Charles Boberg, on which much of the description below is based, following on a tradition of sociolinguistics dating to the 1960s; earlier large-scale American dialectology focused more on lexicology than on phonology.

The Atlas of North American English: Phonetics, Phonology and Sound Change (abbreviated ANAE; formerly, the Phonological Atlas of North America) is a 2006 book that presents an overview of the pronunciation patterns (accents) in all the major dialect regions of the English language as spoken in urban areas of the United States and Canada. It is the result of a large-scale survey by linguists William Labov, Sharon Ash, and Charles Boberg. Speech data was collected, mainly from 1992 to 1999, by means of telephone interviews with individuals in metropolitan areas in all regions of the U.S. and Canada. Using acoustic analysis of speech from these interviews, ANAE traces sound changes in progress in North American English, and defines boundaries between dialect regions based on the different sound changes taking place in them.

The Atlas of North American English received the Leonard Bloomfield Book Award at the 2008 meeting of the Linguistic Society of America.

New York City English, or Metropolitan New York English, is a regional dialect of American English spoken primarily in New York City and some of its surrounding metropolitan area. Along with Southern American English, it has been described by sociolinguist William Labov as one of the most widely recognized regional dialects in the United States. Its pronunciation system—the New York accent—is widely represented in American media by many public figures and fictional characters. Major features of the accent include a high, gliding /ɔ/ vowel (in words like talk and caught); a split of the "short a" vowel /æ/ into two separate sounds; variable dropping of r sounds; and a lack of the cot–caught, Mary–marry–merry, and hurry–furry mergers heard in many other American accents.

Today, New York City English is associated particularly with urban New Yorkers of lower and middle socioeconomic status who are descended from 19th- and 20th-century European immigrants. The dialect is spoken in all five boroughs of the City and throughout Long Island's Nassau County; it is also heard to varying degrees in Suffolk County (Long Island), Westchester County, and Rockland County of New York State plus Hudson County, Bergen County, and the city of Newark (Essex County) in northeastern New Jersey.

Charles Boberg is an academic specializing in sociolinguistics, particularly North American English with a special focus on Canadian English. He is a professor of linguistics at McGill University in Montreal.

He studied at the University of Pennsylvania under William Labov, and later collaborated with him and Sharon Ash in the preparation of The Atlas of North American English, published by De Gruyter in 2006. Boberg has been consulted on matters of national security because of his expertise in identifying regional dialects and vocabulary patterns of North American English.