Question

why do vocal cords open and close while talking​

Answer 1

while talking a vibration is created to create that vibration the vocal cords will contrast and produce sound whereas while we are not talking they will open

Answer 2

When producing sound, the lungs blow air against vocal folds another word for cords), that are closed, but more loosely than they would be during swallowing.Air pushes through the very small space between the vocal folds and in so doing, makes the covering of the vocal folds, known as the mucosa, vibrate. This vibration causes sound.

When we hold our breath, the vocal folds close, when we breath in the vocal cords are open, and they vibrate as air passes through the larynx including when we speak or sing (known as phonation). They oscillate so quickly (opening and closing 440 times per second when singing the A above middle C).

hope this helps you❤