Articulation of Vowel Sounds in Phonetics, a Vowel Is a Sound In
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Articulation of Vowel sounds In phonetics, a vowel is a sound in spoken language that is characterized by an open configuration of the vocal tract so that there is no build-up of air pressure above the glottis. This contrasts withconsonants, which are characterized by a constriction or closure at one or more points along the vocal tract. A vowel is also understood to be syllabic: an equivalent open but non-syllabic sound is called a semivowel. In all languages, vowels form the nucleus or peak of syllables, whereas consonants form the onset and (in languages which have them) coda. However, some languages also allow other sounds to form the nucleus of a syllable, such as the syllabic l in the English word table [ˈteɪ.bl̩] (the stroke under the l indicates that it is syllabic; the dot separates syllables), or the r in the Serbian word vrba[vr̩ .ba] "willow". The word vowel comes from the Latin word vocalis, meaning "speaking", because in most languages words and thus speech are not possible without vowels. ArticulationThe articulatory features that distinguish different vowels in a language are said to determine the vowel's quality. Daniel Jones developed the cardinal vowel system to describe vowels in terms of the common features height (vertical dimension), backness(horizontal dimension) and roundedness (lip position). These three parameters are indicated in the schematic IPA vowel diagram on the right. There are however still more possible features of vowel quality, such as the velum position (nasality), type of vocal fold vibration (phonation), and tongue root position. Height Height refers to the vertical position of the tongue relative to either the roof of the mouth or the aperture of the jaw. In high vowels, such as [i] and [u], the tongue is positioned high in the mouth, whereas in low vowels, such as [a], the tongue is positioned low in the mouth. Sometimes the terms open and close are used as synonyms for low and high for describing vowels. The International Phonetic Alphabet identifies seven different vowel heights, although no known language distinguishes all seven: . close vowel (high vowel) . near-close vowel . close-mid vowel . mid vowel . open-mid vowel . near-open vowel . open vowel (low vowel) It may be that some varieties of German have five contrasting vowel heights independently of length or other parameters. The Bavarian dialect of Amstetten has thirteen long vowels, reported to distinguish four heights (close, close-mid, mid, and near-open) each among the front unrounded, front rounded, and back rounded vowels, plus an open central vowel: /i e ɛ̝ æ̝ /, /y ø œ̝ ɶ̝ /, /u o ɔ̝ ɒ̝ /, /a/. Otherwise, the usual limit on the number of vowel heights is four. The parameter of vowel height appears to be the primary feature of vowels cross-linguistically in that all languages use height contrastively. No other parameter, such as front-back or rounded- unrounded (see below), is used in all languages. Some languages use only height to distinguish vowels. Backness Vowels Have Three Distinctive Features: 1. Tongue height:The high vowels represent vowels made with the body of the tongue close to the roof of the mouth while the low vowels are made with the mouth open and the body of the tongue away from the roof of the mouth. Try saying "ee" then "a" (as in cat) repetitively. Feel your tongue move up for the "ee" and down for the "a" (as in cat). 2. Tongue position: Try saying "ee" then "oo" repetitively and feel your tongue move from front to back. 3. Roundness: Another important dierence among the vowels is whether the lips are rounded or unrounded. For example the "oo" has rounded lips while the "ee" has the lips spread apart. In North American English the high back vowels are rounded. .