The sound system of Norwegian resembles that of Swedish. There is considerable variation among the dialects, and all pronunciations are considered by official policy to be equally correct - there is no official spoken standard, although it can be said that Bokmål has an unofficial spoken standard, called Standard Eastern Norwegian (Norwegian: Standard Østnorsk), loosely based on the speech of the literate classes of the Oslo area. This variant is the most common one taught to foreign students.
Despite there being no official standard variety of Norwegian, Standard Eastern Norwegian has traditionally been used in public venues such as theatre and TV, although today local dialects are used extensively in spoken and visual media.
The background for this lack of agreement is that after the dissolution of Denmark-Norway in 1814, the upper classes would speak in what was perceived as the Danish language, which with the rise of Norwegian romantic nationalism gradually fell out of favour. In addition, Bergen, not Oslo, was the larger and more influential city in Norway until the 19th century. See the article on the Norwegian language conflict for further information.
Unless noted otherwise, this article describes the phonology of Standard Eastern Norwegian.
Most of the retroflex (and postalveolar) consonants are mutations of [ɾ]+any other alveolar/dental consonant; rn /ɾn/ > [ɳ], rt /ɾt/ > [ʈ], rl /ɾl/ > [ɭ], rs /ɾs/ > [ʂ], etc. /ɾd/ across word boundaries (sandhi), in loanwords and in a group of primarily literary words may be pronounced [ɾd], e.g., verden [ˈʋæɾdn̩], but it may also be pronounced [ɖ] in some dialects. Most of the dialects in Eastern, Central and Northern Norway use the retroflex consonants. Most Southern and Western dialects do not have these retroflex sounds, because in these areas a guttural realization of the /r/ phoneme is commonplace, and seems to be expanding. Depending on phonetic context voiceless ([χ]) or voiced uvular fricatives ([ʁ]) are used. (See map at right.) Other possible pronunciations include a uvular approximant [ʁ̞] or, more rarely, a uvular trill [ʀ]. There is, however, a small number of dialects that use both the uvular /r/ and the retroflex allophones.