The 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 ⟨ʙ⟩, a small capital version of the Latin letter b, and the equivalent X-SAMPA symbol is B\.

Features of the voiced bilabial trill: The Knorkator song "[Buchstabe]" (the actual title is a glyph) on the 1999 album Hasenchartbreaker uses a similar sound (though linguolabial instead of bilabial) to replace "br" in a number of German words (e.g. [ˈʙaːtkaɐ̯tɔfəln] for Bratkartoffeln).

That developed historically from a prenasalized stop before a relatively high back vowel like [mbu].

Shaded areas denote articulations judged impossible.