Tài liệu "Ngữ âm học B1&B2" giới thiệu đến các bạn những kiến thức về ngữ âm học và âm vị học, phát âm học, các câu hỏi bài tập thực hành về ngữ âm học B1, ngữ âm học B2. nội dung tài liệu để có thêm tài liệu học tập và nghiên cứu. | Diphthongs are described as sequences of two vowels pronounced together, the two vocalic elements being members of the same syllable. The most important feature of a diphthong is that it contains a glide from one vowel quality to another one. According to the position of the more prominent element in the diphthong we can divide diphthongs into falling diphthongs – if the prominent element comes first – and rising diphthongs – if the less prominent element comes first. All English diphthongs belong to the first category. Diphthongs can then be opening if the degree of aperture increases with the glide or closing if the less prominent vowel is closer than the first. We can also differentiate between wide diphthongs – those in which the glide implies a more radical movement of the speech organs and narrow diphthongs – if the two vocalic elements occupy neighbouring positions on the vowel chart. There are also centring diphthongs – if the glide is from a marginal vowel in the vowel chart – either back or front - to a central vowel. To make it simple, we can say that there are three diphthongs ending in /
