Because the key to affect people's timbre lies in the thickness of the sound band, and the thickness of the sound band is not directly related to people's fatness, so people's fatness can't really affect the timbre. We think that the fat man's voice is broad and loud, and the thin man's voice is weak. Is that really the case? To look at this problem scientifically, we must first make clear how human vocal cords work. Two symmetrical white ligaments, the airflow can be turned off, leaving only a small gap. If the air can be opened, two white doors can be opened and closed. They will vibrate, and even the vibration and sound will let us create different parts of ourselves. Artificial inhalation will separate the two vocal cords, open the door, open the airflow into the lungs, and hold your breath, it will close the two vocal cords, thus preventing the exchange of external airflow with the lungs. So, how do these two ligaments make people's voices rise and fall?

First of all, the human voice will affect the high and low notes. Male vocal cords are long and wide. When air flows through the vocal cords, the vocal cords vibrate in a low voice, and the vocal cords are short and narrow, and the voice is loud and thin. It's not hard to understand. For example, when we hit the iron plate in a large area, the vibration of the iron plate will suffocate. When we hear the tone, the pitch will become higher, the area of percussion instruments will become smaller and the iron plate will vibrate. Secondly, the vocal cords will affect the sound. For example, tightening the string will raise the voice, relax the voice and lower the voice. The same is true for vocal cords, which can be adjusted to control the change of sound.

In addition, the opening and closing degree of the two small doors of vocal cords will also affect the sound. If the wind blows like a big crack in the wall, it won't beep, but if the crack in the wall is narrow, the wind will be as thin and loud as a whistle. So you can control the opening and closing of vocal cords to make a bass or clear sound. For example, when singing high notes, only one gap should be left on the vocal cords to play high notes. Finally, the thickness of vocal cords will also affect the sound. Vocal cords in the same area, the thicker the vocal cords, the smaller the sound, and the thinner and clearer the vocal cords. This explains why children's voices are younger and clearer than those of adults, because children's vocal cords are still soft and thin, because they are still in the stage of growth and development before they are six years old.

Please understand the factors that affect the sound before thinking about the problem. "Will the vocal cords of fat people become thicker and bigger than those of thin people?" Everyone should know how vocal cords grow and develop. Children's vocal cords are in the stage of growth and development before the age of six. At this stage, the vocal cords of men and women are almost the same, and there is no obvious difference in voice. The voice is low, and the vocal cords of girls become smaller, which increases the tone of the voice. Usually, the boy's voice change period can end at the age of 18, while the girl's voice change period can end at the age of 16. Therefore, it can be concluded that the size of vocal cords has nothing to do with fatness, and the thickness of voice has nothing to do with fatness.