Nasal labialized velar approximant
|Nasal labio-velar approximant|
The nasal labio-velar approximant is a type of consonantal sound used in some oral languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨w̃⟩, that is, a w with a tilde. The equivalent X-SAMPA symbol is w~.
Transcriptions using ⟨w̃⟩ may actually intend a non-syllabic vowel, [ũ̯], or, in some dialects of Brazilian Portuguese, a non-syllabic nasalized near-close near-back rounded vowel [ʊ̯̃].
Features of the nasal labio-velar approximant:
- Its manner of articulation is approximant, which means it is produced by narrowing the vocal tract at the place of articulation, but not enough to produce a turbulent airstream.
- Its place of articulation is labialized velar, which means it is articulated with the back part of the tongue raised toward the soft palate (the velum) while rounding the lips.
- Its phonation is voiced, which means the vocal cords vibrate during the articulation.
- It is a nasal consonant, which means air is allowed to escape through the nose, either exclusively (nasal stops) or in addition to through the mouth.
- It is a central consonant, which means it is produced by directing the airstream along the center of the tongue, rather than to the sides.
- The airstream mechanism is pulmonic, which means it is articulated by pushing air solely with the lungs and diaphragm, as in most sounds.
|Polish||są||[sɔũ̯]||'they are'||See Polish phonology|
|Portuguese||European||são||[sɐ̃ũ̯]||'they are'||Allophone of /u/ after nasal vowels, or between nasal occlusives and nasal vowels. Brazilian dialects that have [ʊ] prefer [ʊ̯̃] when in coda position. See Portuguese phonology|
|Some dialects||muamba||[ˈmw̃ɐ̃bɐ]||'smuggling', 'jobbery',
|Seri||cmiique||[ˈkw̃ĩːkːɛ]||'person'||Allophone of /m/|
- Non-syllabic nasalized near-close near-back rounded vowel
|Portuguese||Brazilian||são||[sɐ̃ʊ̯̃]||'they are'||Allophone of /ʊ/ after nasal vowels. See Portuguese phonology|
- Palatal nasal
- Nasal palatal approximant
- Labiodental nasal, which may be an approximant in the one language in which it is phonemic
- Voiceless nasal glottal approximant
- Index of phonetics articles
- Barbosa, Plínio A.; Albano, Eleonora C. (2004), "Brazilian Portuguese", Journal of the International Phonetic Association 34 (2): 227–232, doi:10.1017/S0025100304001756
- Cruz-Ferreira, Madalena (1995), "European Portuguese", Journal of the International Phonetic Association 25 (2): 90–94, doi:10.1017/S0025100300005223