Final answer:
The folds of tissue in the larynx that vibrate to produce sound when air passes through them are called vocal cords, or true vocal cords. They are made up of membranous folds that are capable of oscillation, which permits the generation of sound. Tension and airflow through these cords determine the pitch and volume of the sound produced.
Step-by-step explanation:
The folds of tissue in the larynx that vibrate to produce sound when air passes through them are called the vocal cords. These are also known as true vocal cords and are made up of membranous folds that are attached to muscles at the thyroid and arytenoid cartilages of the larynx on their outer edges. The inner edges of these cords are not attached, allowing them to oscillate freely. As air travels up from the lungs, it passes through the true vocal cords which open and close rhythmically, creating vibrations that escape through the mouth as sound. The pitch of the sound is affected by the tension on the vocal cords, and the loudness depends on the airflow from the lungs.
Vocal Cord Vibration and Sound Production
The process of sound production involves several steps. First, the air passes through the pharynx and then reaches the larynx, containing the vocal cords. When we speak or sing, we manipulate the tension in the true vocal cords as well as the amount of air passing through them. This allows us to produce different sounds with various pitches and volumes. Furthermore, the size of the vocal cords differs between individuals, which contributes to the unique qualities of each person's voice.