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We know helium is less dense than air so helium balloons rise, but
why does helium make your voice sound weird when you suck in the helium
gas?
Today’s
Question by:
Mrs. Thomas’ 4th Hour Class
Midway Middle School
Rigby
Answered
by: Alan Jensen
Pharmacy Manager
Sav-on Pharmacy |
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How Do You Make Sounds?
What makes the sound when
you speak? The air in your
lungs travels upwards to
your larynx, located in the
throat. When you're not
speaking the air passes
through without any
obstruction (quiet
breathing). But when you
want to speak, the vocal
folds (or vocal cords) are
brought close together by
tiny muscles in the larynx.
When the air hits these
vocal folds it makes them
vibrate. Place your fingers
on the front of your throat
and hum. What do you feel?
How Vocal Cords Work
 Materials:
Balloon
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The balloon represents
you lungs. Blow up the
balloon. Don’t tie it
shut.
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Hold the neck of the
balloon shut with both
hands. The neck of the
balloon represents your
throat.
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Stretch the opening of
the balloon so that it
makes a narrow slit. Do
you hear a sound?
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Can you make the
squealing sound higher?
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Can you make the
squealing sound lower?
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How is the balloon like
your vocal cords?
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