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Voiceless bilabial trill

Voiceless bilabial trill
ʙ̥
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The voiceless bilabial trill is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ʙ̥⟩.

This sound is typologically extremely rare. It occurs in languages such as Pará Arára[1] and Sercquiais.[citation needed]

Only a few languages contrast voiced and voiceless bilabial trills phonemically – e.g. Mangbetu of Congo and Ninde of Vanuatu.[2][3]

There is also a very rare voiceless alveolar bilabially trilled affricate, [t̪͡ʙ̥] (written ⟨tᵖ̃⟩ in Everett & Kern) reported from Pirahã and from a few words in the Chapacuran languages Wari’ and Oro Win. The sound also appears as an allophone of the labialized voiceless alveolar stop /tʷ/ of Abkhaz and Ubykh, but in those languages it is more often realised by a doubly articulated stop [t͡p]. In the Chapacuran languages, [tʙ̥] is reported almost exclusively before rounded vowels such as [o] and [y].

Features [ edit ]

Features of the bilabial trill:

  • Its manner of articulation is trill, which means it is produced by directing air over an articulator so that it vibrates.
  • Its place of articulation 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.
  • Because the sound is not produced with airflow over the tongue, the centrallateral dichotomy does not apply.
  • The airstream mechanism is pulmonic, which means it is articulated by pushing air solely with the lungs and diaphragm, as in most sounds.

Occurrence [ edit ]

Language Word IPA Meaning Notes
Pará Arára [1] [ʙ̥utakeni] 'small and round cultivated field'
Kom [ʙ̥ɨmɨ] 'to believe'
Neverver [4] [naɣaᵐʙ̥] 'fire, firewood'
Pará Arára [5] [ʙ̥uta] 'to throw away'
Sercquiais fritt [ʙ̥rɪt] 'crop'
Ubykh [6] [t͡ʙ̥aχəbza] 'Ubykh language' Allophone of /tʷ/. See Ubykh phonology
Wari’ [t͡ʙ̥ot͡ʙ̥oweʔ] 'chicken'

Notes [ edit ]

  1. ^ a b de Souza, Isaac Costa (2010). "3". A Phonological Description of “Pet Talk” in Arara (MA). University of North Dakota. Retrieved 2020-03-30.
  2. ^ Linguist Wins Symbolic Victory for 'Labiodental Flap'. NPR (2005-12-17). Retrieved on 2010-12-08.
  3. ^ LINGUIST List 8.45: Bilabial trill. Linguistlist.org. Retrieved on 2010-12-08.
  4. ^ See pp.33-34 of: Barbour, Julie (2012). A Grammar of Neverver. Germany: Mouton de Gruyter. ISBN 9783110289619.
  5. ^ de Souza, Isaac Costa (2010). "3". A Phonological Description of “Pet Talk” in Arara (PDF) (MA). SIL Brazil. Archived from the original (PDF) on 2013-10-12. Retrieved 2014-01-09.
  6. ^ Ladefoged (2005:165)
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