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This is the NASA eClips Best Practices
guide for the Polyamide Foam Educator Guide.

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In this activity, students will deepen their
understanding of sound and its properties,

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experiment to determine the most efficient sound

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insulators, and design the most effective
combination of materials to suppress sound.

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For this activity you will need a cardboard,
toilet paper tube, a tape measure or meter stick,

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and some common household insulators such
as bubble wrap, newspaper, a cotton sheet,

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cotton quilt batting, and high density
foam. You will also need the source of

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a ticking sound; either a clock or
a device with a ticking sound file.

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Students should begin by documenting their
predictions. They should list each insulator

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in order from what they believe will be the worst
insulator to what they believe will be the best.

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Students should then insert one of the
insulators into a cardboard tube. Then

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with their tape measure or or meter stick laid
out, they should stand next to the source of

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the sound and hold the cardboard tube up
to their ear. Then they should step away

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from the source of the sound until
they can no longer hear any sound.

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Students should document their results
by having each material listed and

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then writing down how far they got from
The Source before they could no longer

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hear any sound noting that the shorter
the distance the better the insulator.

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Then students can test out different combinations

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of materials to see if they
make for better insulators.

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Students can also test to see if inserting
the same materials in a different way,

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by folding or crumbling them,
will make them a better insulator.

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To learn more about insulators and polyamide
foam check out the NASA eClips educator guide.