Learn about The Voice Box in this educational video from dizzo95.
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Male Speaker: The human voice system is like a musical instrument at its center is a vibrating element that produces sound with a varying tone and loudness, the vibrating element in the human voice is the vocal cords, when air is exhale from the lungs and through the larynx it causes the vocal cords to vibrate, during normal breathing the vocal cords are held apart, and no sound is produced. But when the moving cartilages are drawn together by muscles, a vibrating gap is formed to generate sound. The cartilages tilt to control vocal cord tension. And like the strings of a musical instrument the greater the tension the higher the pitch. The lower the tension the lower the pitch, loudness depends on how fast the air moves pass the cords, when we yell we have to push the air rapidly through our vocal cards, speeches formed by a combination of tongue, mouth and lips all working together to control the flow of airy sound from the vocal cords.

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