Is it true, “if you see a person’s throat, you can determine if their singing voice is good or not?”
The answer is, almost Yes.
Actually, a good throat shape can indicate if an individual has the potential to sing a song very well. This means, that a good shaped throat does play an important role, because it can control the sound emitted more freely.
Sound is made by the vocal cord, and this also determines the the pitch.
The vocal cord is elongated, contracted, inflated, thinned, and hardened as well as tender. These many forms can be compared to the strings of guitar, reed of clarinet or mouthpiece of a trumpet.
The vocal cord is moved by other muscles, and cannot move by itself. You do need to move the arytenoid cartilage freely, which is located on the cricoid cartilage.
People say that the arytenoid cartilage is similar to the saddle joint, but personally I thought that it appeared more flat when I saw it in a human anatomy laboratory.
The performance of vocalization can be improved, and depends on how the arytenoid cartilage functions.
If I can visually observe the space on the vocal cord I can know what kind of tone color a person has, because it is created in the spatial resonance.
The following photo displayed below is a numbered summary about how the external movements of the throat combined with a good throat shape can influence vocal production.
(2)Can inflate the hyoid bone under the jaw
(3)Can inflate under the rear jaw.
(4)Can move the thyroid cartilage freely.
(5)Can move lips wide when speaking.