Features of the voiceless alveolar sibilant affricate:
Its manner of articulation is sibilantaffricate, which means it is produced by first stopping the air flow entirely, then directing it with the tongue to the sharp edge of the teeth, causing high-frequency turbulence.
The stop component of this affricate is laminalalveolar, which means it is articulated with the blade of the tongue at the alveolar ridge. For simplicity, this affricate is usually called after the sibilant fricative component.
There are at least three specific variants of the fricative component:
Dentalized laminal alveolar (commonly called "dental"), which means it is articulated with the tongue blade very close to the upper front teeth, with the tongue tip resting behind lower front teeth. The hissing effect in this variety of [s] is very strong.[1]
Retracted alveolar, which means it is articulated with either the tip or the blade of the tongue slightly behind the alveolar ridge, termed respectively apical and laminal. Acoustically, it is close to [ʃ] or laminal [ʂ].
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 fricative component is apical.[29] In some accents, it is realized as [tʰ].[29] Usually transcribed /tˢ/ or /t/. Contrasts with the unaspirated stop [t], which is usually transcribed /d̥/ or /d/. See Danish phonology
Marginal sound. Many Brazilians might break the affricate with epenthetic [i], often subsequently palatalizing /t/, specially in pre-tonic contexts (e.g. tsunami[tɕisuˈnɜ̃mʲi]).[43] See Portuguese phonology
The fricative component varies between dentalized laminal and non-retracted apical. In the latter case, the stop component is laminal denti-alveolar.[46] See Italian phonology
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 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.
^ abcdHualde, Lujanbio & Zubiri (2010:1). Although this paper discusses mainly the Goizueta dialect, the authors state that it has "a typical, conservative consonant inventory for a Basque variety".
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