The voiceless palatal plosive or stop is a type of consonantal sound used in some vocal languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨c⟩, and the equivalent X-SAMPA symbol is c.
Voiceless palato-alveolar and post-palatal plosives
Voiceless alveolo-palatal plosive
c̟
t̠ʲ
If distinction is necessary, the voiceless alveolo-palatal plosive may be transcribed as ⟨c̟⟩ (advanced ⟨c⟩) or ⟨t̠ʲ⟩ (retracted and palatalized ⟨t⟩), but these are essentially equivalent, because the contact includes both the blade and body (but not the tip) of the tongue. The equivalent X-SAMPA symbols are c_+ and t_-' or t_-_j, respectively. There is also a non-IPA letter U+0236ȶLATIN SMALL LETTER T WITH CURL; ⟨ȶ⟩ ("t", plus the curl found in the symbols for alveolo-palatal sibilant fricatives ⟨ɕ, ʑ⟩), which is used especially in sinological circles.
It is common for the phonetic symbol ⟨c⟩ to be used to represent voiceless postalveolar affricate[t͡ʃ] or other similar affricates, for example in the Indic languages. This may be considered appropriate when the place of articulation needs to be specified and the distinction between plosive and affricate is not contrastive.
Voiceless post-palatal plosive
Voiceless alveolo-palatal plosive
c̠
k̟
There is also the voiceless post-palatal plosive[1] in some languages, which is articulated slightly more back compared with the place of articulation of the prototypical palatal consonant, though not as back as the prototypical velar consonant. The International Phonetic Alphabet does not have a separate symbol for that sound, though it can be transcribed as ⟨c̠⟩ (retracted ⟨c⟩) or ⟨k̟⟩ (advanced ⟨k⟩). The equivalent X-SAMPA symbols are c_- and k_+, respectively.
Especially in broad transcription, the voiceless post-palatal plosive may be transcribed as a palatalized voiceless velar plosive (⟨kʲ⟩ in the IPA, k' or k_j in X-SAMPA).
Features
Features of the voiceless palatal stop:
Its manner of articulation is occlusive, which means it is produced by obstructing airflow in the vocal tract. Since the consonant is also oral, with no nasal outlet, the airflow is blocked entirely, and the consonant is a plosive.
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.
↑Instead of "post-palatal", it can also be called "retracted palatal", "backed palatal", "palato-velar", "pre-velar", "advanced velar", "fronted velar" or "front-velar". For simplicity, this article uses only the term "post-palatal".
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