How to distinguish front and back nasal sounds

Prenasal sound: refers to pinyin ending in "n", such as: an, en, in un；; N is the nasal sound on the tip of the tongue. When pronouncing, the tip of your tongue sticks to your upper gum.

Posterior nasal sound: refers to the end of pinyin; With "ng", such as: ang, eng, ong, ingNg is the nasal sound of the root of the tongue. When you pronounce this sound, you should rest the base of your tongue on the soft palate.

Extended data:

Front nasal rhyme? The pronunciation skill of -n is that at the end of pronunciation, the tongue is close to the gum, and the tongue and gum in the mouth form obstacles and are completely blocked, and the soft palate droops to ventilate the nasal cavity.

The vowel of the front nasal sound is ian uan üan en in uen ün n n.

Pronunciation skills:

1, the nasal sound is light and short.

2. At the end of pronunciation, put your tongue against the upper gum, pass your nose, and make a nasal ending-n.

3.an and en can form syllables independently or with initials.

There are eight nasal sounds in Mandarin, namely ang, ANG, ANG, eng, ing, ueng, ong and ONG.

Postnasal sounds such as ang, eng and ing are pronounced, while the front vowel is pronounced later, a is pronounced after a, and e is originally a backward vowel. Vowels A and E contract backwards at the same time, and then rise in a positive parabola, blocking the root of the tongue and the soft palate, making air flow into the nasal cavity from the back mouth and making nasal sounds. I is the vowel before the tip of the tongue, which is pronounced in front. Therefore, when pronouncing the ing sound, the tongue heel is pulled backwards while pronouncing the I sound, which makes the tongue heel and soft palate form obstacles and leads to nasal humming.

References:

Baidu encyclopedia-Baidu encyclopedia before nose-after nose