Voiceless linguolabial fricative
# Voiceless linguolabial fricative

The voiceless linguolabial fricative is a type of consonantal sound used in some spoken languages. The symbol in the International Phonetic Alphabet that represents it is ⟨θ̼⟩ or ⟨ɸ̺⟩.

## Features

Features:

* Its manner of articulation is fricative, which means it is produced by constricting air flow through a narrow channel at the place of articulation, causing turbulence.
* Its place of articulation is linguolabial, which means it is articulated with the tongue against the upper lip.
* Its phonation 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 an oral consonant, which means air is allowed to escape through the mouth only.
* The airstream mechanism is pulmonic, which means it is articulated by pushing air solely with the intercostal muscles and diaphragm, as in most sounds.

## Occurrence

| Language | Language | Word | IPA | Meaning | Notes |
| - | - | - | - | - | - |
| Big Nambas | Big Nambas | | [ˈinɛθ̼] | 'he is asthmatic' | |
