Features
Features of the voiceless alveolar sibilant:
- Its manner of articulation is sibilant fricative, which means it is generally produced by channeling air flow along a groove in the back of the tongue up to the place of articulation, at which point it is focused against the sharp edge of the nearly clenched teeth, causing high-frequency turbulence.
- Its place of passive articulation is alveolar, which means it is articulated with the tongue at the alveolar ridge just behind the gums.
- Its place of active articulation is usually laminal, meaning that the tongue blade (the part just behind the top) contacts the alveolar ridge, with the tongue tip resting behind the lower front teeth. However, according to Ladefoged and Maddieson, an apical articulation (with the tongue tip touching the alveolar ridge) is also possible, with in fact about an equal number of English speakers using each of the two types.
- 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 lungs and diaphragm, as in most sounds.
Read more about this topic: Voiceless Alveolar Sibilant
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