The voiceless bilabial trill is a type of

consonant In articulatory phonetics, a consonant is a speech sound that is articulated with complete or partial closure of the vocal tract, except for the h sound, which is pronounced without any stricture in the vocal tract. Examples are and pronou ...

al sound, used in some spoken

language Language is a structured system of communication that consists of grammar and vocabulary. It is the primary means by which humans convey meaning, both in spoken and signed language, signed forms, and may also be conveyed through writing syste ...

s. The symbol in the

International Phonetic Alphabet The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standard written representation ...

that represents this sound is . The

X-SAMPA The Extended Speech Assessment Methods Phonetic Alphabet (X-SAMPA) is a variant of SAMPA developed in 1995 by John C. Wells, professor of phonetics at University College London. It is designed to unify the individual language SAMPA alphabets, and ...

symbol is B\_0 This sound is typologically extremely rare. It occurs in languages such as Pará Arára and

Sercquiais Sercquiais (), also known as , Sarkese or Sark-French, is the Norman dialect of the Channel Island of Sark (Bailiwick of Guernsey). Sercquiais is a descendant of the 16th century Jèrriais used by the original colonists; 40 families mostly fr ...

. Only a few languages contrast voiced and voiceless bilabial trills phonemically – e.g. Mangbetu of Congo and Ninde of Vanuatu.LINGUIST List 8.45: Bilabial trill
Linguistlist.org. Retrieved on 2010-12-08. There is also a very rare voiceless alveolar bilabially trilled affricate, (written in Everett & Kern) reported from Pirahã and from a few words in the Chapacuran languages

Wariʼ The Wariʼ, also known as the Pakaa Nova, are an indigenous people of Brazil, living in seven villages in the Amazon rainforest in the state of Rondônia. Their first contact with European settlers was on the shores of the Pakaa Nova River, a t ...

and Oro Win. The sound also appears as an

allophone In phonology, an allophone (; from the Greek , , 'other' and , , 'voice, sound') is one of multiple possible spoken soundsor '' phones''used to pronounce a single phoneme in a particular language. For example, in English, the voiceless plos ...

of the labialized voiceless alveolar stop of Abkhaz and Ubykh, but in those languages it is more often realised by a doubly articulated stop . In the Chapacuran languages, is reported almost exclusively before rounded vowels such as and . Additionally, Lese has another rare trilled affricate, a labial–velar trilled affricate , which occurs as an allophone of the

voiceless labial–velar plosive The voiceless labial–velar plosive or stop is a type of consonantal sound, used in some spoken languages. It is a and pronounced simultaneously and is considered a double articulation. To make this sound, one can say ''Coe'' but with the lip ...

Features

Features of the bilabial trill:

Occurrence

Notes

{{IPA navigation Trill consonants Pulmonic consonants Voiceless oral consonants Bilabial consonants