the human voice system is like a musical
instrument at its center is a vibrating
element that produces sound with varying
tone and loudness the vibrating element
in the human voice is the vocal chords
when air is exhaled 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 that generates
sound the cartilage is 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 past
the chords when we yell we have to push
the air rapidly through our vocal cords
speech is formed by a combination of
tongue mouth and lips all working
together to control the flow of air and
sound from the vocal cords