Bidental Consonant
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Bidental Consonant

Bidental consonants are consonants articulated with both the lower and upper teeth. They are normally found only in speech pathology, and are distinct from interdental consonants such as [n], which involve the tongue articulated between the teeth rather than the teeth themselves. The diacritic for bidental consonants in the extensions to the IPA is the same superscript plus subscript bridge, ⟨⟩. This is used for three sounds in disordered speech:

  • A bidental percussive, [?], produced by striking the teeth against each other (gnashing or chattering the teeth).
  • A voiceless bidental fricative, [h], a fricative made through clenched teeth with no involvement of the tongue or the lips, a "bidental (consonant) produced by air passing through the closed front teeth."[1]
    • ([t] is [t] with bidental aspiration.)
  • A voiced bidental fricative, [].

There is at least one confirmed attestation of a bidental consonant in normal language. The Black Sea sub-dialect of the Shapsug dialect of Adyghe has a voiceless bidental fricative where other dialects have [x], as in "six" and ? "beautiful". It has been transcribed as ⟨x⟩, reflecting its value in other dialects, but there is no frication at the velum. The teeth themselves are the only constriction: "The lips [are] fully open, the teeth clenched and the tongue flat, the air passing between the teeth; the sound is intermediate between [?] and [f]" (L&M 1996:144-145). This is better transcribed phonetically as ⟨h⟩, since [h] has no place of articulation of its own.

References

  1. ^ Matthews, Peter Hugoe (2003). The Concise Oxford Dictionary of Linguistics, p.40. Oxford University Press. ISBN 9780199202720.

Further reading


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