![]() ![]() Jones defines diphthongs as unisyllabic gliding sounds in the articulation of which the organs of speech start from one position and then glide to another position. The 3d group of scientists defines a diphthong from the accentual point of view: since only one element is accented and the other is unaccented, a diphthong is a single sound.ĭ. Another definition of a diphthong as a single sound is based on the instability of the second element. Since in a diphthong only one element serves as a syllabic nucleus, a diphthong is a single sound. One definition is based on the ability of a vowel to form a syllable. The English diphthongs are, like the affricates, the object of a sharp phonological controversy, whose essence is the same as in the case of affricates are the English diphthongs biphonemic sound complexes or composite monophonemic entities?ĭiphthongs are defined differently by different authors. Principles of classification provide the basis for the establishment of the following distinctive oppositions:īit - bait, kit - kite, John - join, debt - doubtģ. The following 20 vowel phonemes are distinguished in BBC English (RP).
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