The voiceless velar affricate is a type of consonantal sound, used in some spoken languages. The symbols in the International Phonetic Alphabet that represents this sound are ⟨k͡x⟩ and ⟨k͜x⟩, and the equivalent X-SAMPA symbol is k_x. The tie bar may be omitted, yielding ⟨kx⟩ in the IPA and kx in X-SAMPA.

Some languages have the voiceless pre-velar affricate,^[1] which is articulated slightly more front compared with the place of articulation of the prototypical voiceless velar affricate, though not as front as the prototypical voiceless palatal affricate - see that article for more information.

Conversely, some languages have the voiceless post-velar affricate,^[2] which is articulated slightly behind the place of articulation of the prototypical voiceless velar affricate, though not as back as the prototypical voiceless uvular affricate - see that article for more information.

Features of the voiceless velar affricate:

• Its manner of articulation is affricate, which means it is produced by first stopping the airflow entirely, then allowing air flow through a constricted channel at the place of articulation, causing turbulence.
• Its place of articulation is velar, which means it is articulated with the back of the tongue (the dorsum) at the soft palate.
• 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.
• It is a central consonant, which means it is produced by directing the airstream along the center of the tongue, rather than to the sides.
• The airstream mechanism is pulmonic, which means it is articulated by pushing air solely with the intercostal muscles and abdominal muscles, as in most sounds.

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