Voiced bilabial trill

A voiced bilabial trill is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents the sound is, a small capital letter b.

Features

Features of a voiced bilabial trill:
In most instances, it is only found as the trilled release of a prenasalized stop.

In many of the languages in which the bilabial trill occurs, it occurs only as part of a prenasalized bilabial stop with trilled release,. That developed historically from a prenasalized stop before a relatively high back vowel like. In such instances, the sounds are usually still limited to the environment of a following. However, the trills in Mangbetu may precede any vowel and are sometimes preceded by only a nasal.