Voiced bilabial trill

Bilabial trill
ʙ
Image
IPA number	121
Encoding
Entity (decimal)	ʙ
Unicode (hex)	U+0299
X-SAMPA	B\

"Bilabial trill" redirects here. For the voiceless consonant, see Voiceless bilabial trill.

The voiced bilabial trill is a consonant. It is used in some spoken languages. The letter for this sound in the International Phonetic Alphabet is ⟨ʙ⟩. The X-SAMPA symbol for this sound is B\.

In many of the languages that contain the voiced bilabial trill, it only occurs as part of a prenasalised bilabial stop with trilled release, [mbʙ]. This developed historically from a prenasalized stop before a relatively high back vowel, such as [mbu]. In such instances, these sounds are usually still limited to the environment of a following [u].

Features

Features of the bilabial trill:

• Its behavior is trill. It means that we produce this sound by directing air over the articulator so that it vibrates. In most instances, it is only found as the trilled release of a prenasalized stop.

• We produce it at bilabial. It means that we produce this sound with both lips.
• Its phonation is voiced. It means that the vocal cords vibrate during the articulation.
• It is an oral consonant. It means that air is allowed to escape through the mouth only.
• We do not produce this sound with air flowing over the tongue. So, the central–lateral dichotomy is not suitable.
• The airstream mechanism is pulmonic. It means that we produce this sound by pushing air solely with the lungs and diaphragm, as in most sounds.

Examples

Language		Word	IPA	Meaning	Notes
Kele		[ᵐʙulim]		'face'
Kom		[ʙ̥ɨmɨ]		'to believe'
Pirahã		kaoáí'b'ogicode: myp is deprecated	[kàò̯áí̯ʙòˈɡì]	'evil spirit'	allophone of /b/ before /o/
Titan		[ᵐʙutukei]		'wooden plate'
Unua		[ᵐʙue]		'pig'

Other websites

• Oro Win recordings