Avoiceless linguolabial fricative is a type ofconsonantal sound used in some spokenlanguages. The symbol in theInternational Phonetic Alphabet that represents it is ⟨θ̼⟩ or less commonly ⟨s̼⟩ or ⟨f̼⟩.

• Itsmanner of articulation isfricative, which means it is produced by constricting air flow through a narrow channel at the place of articulation, causingturbulence.
• Itsplace of articulation islinguolabial, which means it is articulated with the tongue against the upperlip.
• Itsphonation 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 anoral consonant, which means that air is not allowed to escape through the nose.
• Itsairstream mechanism ispulmonic, which means it is articulated by pushing air only with theintercostal muscles andabdominal muscles, as in most sounds.

• Fricative consonants
• Linguolabial consonants
• Pulmonic consonants
• Voiceless oral consonants

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• Short description is different from Wikidata
• Pages with plain IPA