Sound is produced inside us in a similar way musical instruments create sound. Our vocal chords are like the strings of a guitar that are plucked by the wind produced in our lungs. We are following the book The Way We Work by David Macaulay to learn about human body biology.
Cartilage is flexible and muscles are used to move the cartilage in such a way that the vocal chords are put under various levels of tension. The amount of tension determines the pitch of the sounds. Since the garbage can, headphones and soap dispensers were all flexible the kids were able to change the pitch produced by the rubber bands while plucking them with their fingers.
To see the rest of our science activities please visit our science page.
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