A velopharyngeal fricative, also known as a posterior nasal fricative, is a sound produced by some children with speech disorders, including some with a

cleft palate A cleft lip contains an opening in the upper lip that may extend into the nose. The opening may be on one side, both sides, or in the middle. A cleft palate occurs when the palate (the roof of the mouth) contains an opening into the nose. The ...

, as a substitute for sibilants (), which cannot be produced with a cleft palate. It results from "the approximation but inadequate closure of the upper border of the velum and the posterior pharyngeal wall."Martin Duckworth, George Allen, William Hardcastle & Martin Ball (1990) ‘Extensions to the International Phonetic Alphabet for the transcription of atypical speech.’ Clinical Linguistics & Phonetics 4: 4, p. 276. To produce a velopharyngeal fricative, the soft palate approaches the

pharyngeal wall Pharyngeal may refer to: Anatomy * Pharynx, for pharyngeal anatomy * Pharyngeal muscles ** Superior pharyngeal constrictor muscle ** Middle pharyngeal constrictor muscle ** Inferior pharyngeal constrictor muscle * Pharyngeal artery * Pharyngea ...

and narrows the

velopharyngeal port The velopharyngeal port or velopharyngeal sphincter is the passage between the nasopharynx and the oropharynx. It is closed off by the soft palate and uvula against the rear pharyngeal wall during swallowing to prevent food and water from entering ...

, such that the restricted port creates

fricative A fricative is a consonant produced by forcing air through a narrow channel made by placing two articulators close together. These may be the lower lip against the upper teeth, in the case of ; the back of the tongue against the soft palate in t ...

turbulence in air forced through it into the nasal cavity. The articulation may be aided by a posterior positioning of the tongue and may involve velar flutter (a snorting sound). The term 'velopharyngeal' indicates "articulation between the upper surface of the velum and the back wall of the naso-pharynx." The base symbol for a velopharyngeal fricative in the

extensions to the International Phonetic Alphabet The Extensions to the International Phonetic Alphabet for Disordered Speech, commonly abbreviated extIPA , are a set of letters and diacritics devised by the International Clinical Phonetics and Linguistics Association to augment the Internatio ...

for disordered speech is , and secondary articulation is indicated with a double tilde, . The following variants are described: * A voiceless velopharyngeal fricative * A voiced velopharyngeal fricative * A velopharyngeal fricative trill or "snort" (much as epiglottal fricatives tend to be trilled): **voiceless ( Feng trill

) **voiced *Other consonants accompanied by velopharyngeal frication, such as = ,A double tilde might be confused with doubling the nasal tilde used to indicate that a sound is heavily nasalized potentially transcribed with an additional to overtly indicate accompanying trill. The letter for the trill was only adopted in 2015; before then the letter stood for both. Some authorities describe the trilled velopharyngeals as being accompanied by

uvular trill The voiced uvular trill is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is , a small capital letter ''R''. This consonant is one of several collectively ...

rather than velar flutter. Whether this is a difference in interpretation or of pronunciation, it would be explicitly transcribed with a superscript : voiceless () and voiced .

External links

*Production videos fo
Consonants (ExtIPA symbols)
(click on in the chart for a plain )

References

Speech disorders Fricative consonants Nasal consonants {{phonetics-stub

See also

External links

References