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A diphthong is a single-syllable vowel sound in which the beginning of the sound is different from the end sound—that is, the sound glides from one vowel sound to another. For this reason, diphthongs are often referred to as gliding vowels.
There are eight vowel sounds in American English that are generally agreed upon as being diphthongs.
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the combination of two vowels—a syllabic and a nonsyllabic vowel—in one syllable, for example, the French [oi]. Two types of diphthongs may be distinguished: the rising diphthong, in which the second vowel is the syllable-building element, for example, the French [ie] and [ui] and the falling diphthong, in which the first vowel is the syllable-building element, for example, the English [ai] and [au].

References in periodicals archive ?
The data were submitted to statistical analyses, with the following general results: (1) Learners produced a hiatus where native speakers (control group) prefer a diphthong, (2) An inhibitory effect resulted from cognates with hiatuses in English, and (3) Learners' intuitions tended to correlate with acoustic analyses.
Marta Rudzite (1993 : 150-153) hat die Standpunkte mehrerer Generationen von Baltologen zusammengefasst: Der litauische und lettische Diphthong ie ist kein Erbe aus dem Urbaltischen, sondern ist erst aus dem urbalt.
Love [right arrow] lelft : /[et]/ [right arrow] /e/ /e/ Second [right arrow] thicken From mid to high vowel Initial /se/ understood as /[theta]i/ Difficult word: horrible Vowels are changed by diphthong a[?
Similarly, there is the fifth type of common syllable, where a word ends in a diphthong followed immediately by another vowel.
The presence of the following diphthong in MP and ISP can be seen as data below.
First, Toon (1992: 431) argues that both the traditional West Germanic /e:/ and /e/ become the diphthong spelled <eo> in Old English when they occurr before [x] - which can be written <c>, <g> or <h> - or when they occur before [l + C] or [r + C].
Stressing of the diphthong highly influence visualization of the speech since stressed syllable is more expressive then others.
Recall that diphthongs always contain a high vowel as a second component, and iu is not a permissible diphthong (see section 2).
A diphthong is defined as a sound which consists of `a movement of glide from one vowel to another' (Roach, 2000).
A tendency to shorten diphthongs and to leave out the second element in a diphthong e.
Consequently, the two components of the diphthong that are separated by the glide form two different syllable nuclei and hence the word is disyllabified.
The paper discusses the geographical distribution of the monophthongisation of (1) the diphthong [ei] (< [e:c]) before the palatal fricative [c] (i.