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The voiced alveolar trill is a type of consonantal sound used in some spoken languages.The symbol in the International Phonetic Alphabet that represents dental, alveolar, and postalveolar trills is r , and the equivalent X-SAMPA symbol is r.
The coronal trill is most frequently alveolar [r͇], but dental and postalveolar articulations [r̪] and [r̠] also occur. An alleged retroflex trill found in Toda has been transcribed [ɽ] (that is, the same as the retroflex flap ), but might be less ambiguously written [ɽr] , as only the onset is retroflex, with the actual trill being alveolar.
The voiced alveolar approximant is a type of consonantal sound used in some spoken languages. The symbol in the International Phonetic Alphabet that represents the alveolar and postalveolar approximants is ɹ , a lowercase letter r rotated 180 degrees. The equivalent X-SAMPA symbol is r\.
Features of the voiceless 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,
If the alveolar flap is the only rhotic consonant in the language, it may be transcribed with r although that symbol technically represents the trill. The voiced alveolar tapped fricative reported from some languages is actually a very brief voiced alveolar non-sibilant fricative.
If a trill is made with the tip of the tongue against the upper gum, it is called an apical (tongue-tip) alveolar trill; the IPA symbol for this sound is [r]. Most non-alveolar trills, such as the bilabial one , however, are not considered rhotic.
The letters s, t, n, l are frequently called 'alveolar', and the language examples below are all alveolar sounds. (The Extended IPA diacritic was devised for speech pathology and is frequently used to mean "alveolarized", as in the labioalveolar sounds [p͇, b͇, m͇, f͇, v͇] , where the lower lip contacts the alveolar ridge.)
The alveolar and dental ejective stops are types of consonantal sounds, usually described as voiceless, that are pronounced with a glottalic egressive airstream. In the International Phonetic Alphabet , ejectives are indicated with a "modifier letter apostrophe" ʼ , [ 1 ] as in this article.