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A voiceless postalveolar fricative is a type of consonantal sound used in some spoken languages.The International Phonetic Association uses the term voiceless postalveolar fricative only for the sound [ ʃ ], [1] but it also describes the voiceless postalveolar non-sibilant fricative [ɹ̠̊˔], for which there are significant perceptual differences.
The voiceless dental plosive can be distinguished with the underbridge diacritic, t̪ and the postalveolar with a retraction line, t̠ , and the Extensions to the IPA have a double underline diacritic which can be used to explicitly specify an alveolar pronunciation, t͇ . The [t] sound is a very common sound cross-linguistically. [1]
Postalveolar, which means it is articulated with either the tip or the blade of the tongue behind the alveolar ridge, termed respectively apical and laminal. Its phonation is voiceless, which means it is produced without vibrations of the vocal cords. It is an oral consonant, which means air is allowed to escape through the mouth only.
pharyngealized voiced postalveolar fricative [ʒˤ] (in Kabyle and Chechen) pharyngealized voiceless dental fricative [θˤ] (in Zenaga, Shawiya and Shehri) pharyngealized voiced dental fricative [ðˤ] ⓘ (in Arabic ظ, and as [θ̬ˤ], a variant pronunciation in Mehri) pharyngealized voiceless alveolar lateral fricative [ɬˤ]
Its place of articulation is palato-alveolar, that is, domed (partially palatalized) postalveolar, which means it is articulated with the blade of the tongue behind the alveolar ridge, and the front of the tongue bunched up ("domed") at the palate. Its phonation is voiceless, which means it is produced without vibrations of the vocal cords.
Alveolo-palatal fricatives are a class of consonants in some oral languages. The consonants are sibilants, a variety of fricative. Their place of articulation is postalveolar. They differ in voicing. The voiceless alveolo-palatal fricative and voiced alveolo-palatal fricative are written ɕ and ʑ in the International Phonetic Alphabet.
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Features of the voiced alveolar fricative trill: Its manner of articulation is fricative trill, which means it is a non-sibilant fricative and a trill pronounced simultaneously. Its place of articulation is laminal alveolar, which means it is articulated with the blade of the tongue at the alveolar ridge.