What is light tone?

Light tone is a special tone sandhi phenomenon in Chinese, which appears in most dialects and Putonghua in China. Light tone is generally not regarded as tone, because it has no fixed tone value.

There are only four tones in modern Chinese Pinyin: even tone, rising tone, rising tone and falling tone. In the phonetic sequence, many syllables often lose their original tone, but are read as a light and short tone. It is not the fifth tone besides the four tones, but a special tone sandhi of the four tones, which is physically manifested as the shortening of tone length and the weakening of tone intensity. There is no fixed tone value of light tone, which is generally determined according to the tone of the previous word, so the tone is not marked.

Extended data:

Pronunciation precautions

1, pronunciation organ

The vocal organs include three parts: lungs, throat and mouth. The vocal organs can be divided into two parts: the upper laryngeal organs and the larynx. The upper laryngeal organs are composed of oral cavity, nasal cavity and pharyngeal cavity.

2. Throat

The larynx is the main sound source of speech. This is a longitudinal sectional view of the throat, including the side and front.

3, vocal cords

The vocal cords can be seen from the longitudinal section of the larynx. Vocal cords are two elastic belt, which are actually the two ends of the inner wall of trachea. The anterior end is fixed on the thyroid cartilage, and the posterior end is fixed on the vocal cord process of arytenoid cartilage. The interval between the two vocal cords is glottis, which are in front of glottis and behind glottis.

4. Sound cavity

Laryngeal cavity, pharyngeal cavity, oral cavity, lip cavity and nasal cavity constitute the sound cavity of human vocal organs, which is a very flexible and changeable vibration cavity. When the vocal cords pass through the acoustic cavity, due to the different shapes of the acoustic cavity, they produce different fair vibrations and form different sounds.

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