[2] The supposed mainstream English accent of the United States has been called "General American" since the early-mid 20th century.
He has also referred to a particular general and non-local accent common throughout Ireland as "supraregional".
[3] Sometimes a third category is also distinguished: a cultivated accent that is considered particularly cultured, stylish, affluent, or even contrived, associated with the educated upper class of a given region.
All three distinctions (cultivated, general, and broad) are well studied varieties within South African, New Zealand, and Australian English phonology.
The same three basic concepts also commonly characterize scholarly discussions of the dialects of southeastern England (particularly around London) in the 21st century—namely: Received Pronunciation (cultivated), Estuary English (general), and Cockney or Multicultural London English (broad).