1. The vowel of the retronasal sound is one of the most important phonetic phenomena in China Putonghua and most Chinese dialects. In Mandarin, postnasal vowels account for most vowels. When these postnasal vowels are pronounced, the main features are that the vowels are borne by nasal sounds, the tip of the tongue is pressed against the lower gum, the tongue surface is lifted, the soft palate is drooping, the nasal cavity is ventilated, and the sound emerges from the nasal cavity.
2. The importance of postnasal vowels in Chinese pronunciation is self-evident. They play an important role in word formation and expression of ideas. Because of its special pronunciation, the vowels of postnasal sounds make Chinese pronunciation more colorful and enhance the accuracy and vividness of language expression. In poetry, songs and other art forms, the use of nasal vowels creates a unique rhythm and aesthetic feeling.
3. From the point of view of language acquisition, it is very important for foreigners learning Chinese to correctly master the pronunciation of vowels with nasal vowels. For learners whose mother tongue is not Chinese, learning nasal vowels is an important part to break through the difficulties of Chinese pronunciation.
Related contents of vowels in postnasal sounds
1. In view of the pronunciation problem of vowels with nasality, Professor Wang Shiyuan's article "Putonghua Phonetics and Putonghua Pinyin" elaborated the pronunciation characteristics of vowels with nasality in detail. The article points out that the key to nasal vowels is the decrease of ventilation in soft palate and nasal cavity. This process requires the coordination of tongue position, lip shape, throat and vocal cords.
2. Professor Shi Feng's postnasal initials in Beijing dialect. Based on the on-the-spot investigation and study of Beijing dialect pronunciation, this paper describes in detail the pronunciation characteristics of Beijing dialect's retronasal initials and their differences from those of its pre-nasal initials. It is found that when Beijing dialect is pronounced, the soft palate drops and remains for a period of time, so that the sound emerges from the nasal cavity.
3. Vowels with retronasal sounds are an indispensable part of Chinese phonetic system, which is of great significance to Chinese word formation, expression and language acquisition. Related research papers are of great value for correctly understanding and mastering the pronunciation principle and practical methods of vowels with retronasal sounds.