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The voiceless glottal fricative, sometimes called voiceless glottal transition, and sometimes called the aspirate, is a type of sound used in some spoken languages that patterns like a fricative or approximant consonant ''phonologically'', but often lacks the usual ''phonetic'' characteristics of a consonant. The symbol in the International Phonetic Alphabet that represents this sound is , and the equivalent X-SAMPA symbol is h. Although has been described as a voiceless vowel, because in many languages it lacks the place and manner of articulation of a prototypical consonant, it also lacks the height and backness of a prototypical vowel: The Lamé language contrasts voiceless and voiced glottal fricatives. ==Features== Features of the "voiceless glottal fricative": * In some languages, it has the constricted manner of articulation of a fricative. However, in many if not most it is a transitional state of the glottis, with no manner of articulation other than its phonation type. Because there is no other constriction to produce friction in the vocal tract in the languages they are familiar with, many phoneticians no longer consider to be a fricative. However, the term "fricative" is generally retained for historical reasons. * It may have a glottal place of articulation. However, it may have no fricative articulation, in which case the term 'glottal' only refers to the nature of its phonation, and does not describe the location of the stricture nor the turbulence. All consonants except for the glottals, and all vowels, have an individual place of articulation in addition to the state of the glottis. As with all other consonants, surrounding vowels influence the pronunciation , and has sometimes been presented as a voiceless vowel, having the place of articulation of these surrounding vowels. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Voiceless glottal fricative」の詳細全文を読む スポンサード リンク
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