The voiceless bilabially post-trilled dental stop is a very rare consonantal sound reported to occur in a few spoken languages: the Oro Win and Wariʼ languages in South America and Sangtam in Northeast India. The symbol in the International Phonetic Alphabet that represents this sound is ⟨t̪ʙ̥⟩, and the equivalent X-SAMPA symbol is t_dB\_0.

Features

Features of the voiceless bilabially post-trilled dental stop:

• Its manner of articulation is trill, which means it is produced by directing air over an articulator so that it vibrates.
• It has two places of articulation:
  • The stop is dental, which means it is articulated with either the tip or the blade of the tongue at the upper teeth, termed respectively apical and laminal.
  • The trill is bilabial, which means it is articulated with both lips.
• Its phonation is voiceless, which means it is produced without vibrations of the vocal cords. In some languages the vocal cords are actively separated, so it is always voiceless; in others the cords are lax, so that it may take on the voicing of adjacent sounds.
• It is an oral consonant, which means air is allowed to escape through the mouth only.
• 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 intercostal muscles and abdominal muscles, as in most sounds.

Occurrence

References

External links

• List of languages with [t̪ʙ] on PHOIBLE