Let’s Hear it for Math!
Our Crazy 8’s Math Club was at it again, this time exploring sound! We compared lengths and made sound with straws of different lengths. We noticed the relationship between the length of the straw and the pitch of the sound made with it. The longer the straw, the lower the sound! We ordered the straws by length and assembled them into pan pipes. We even used a giant sound meter to see how loud we could get and used subtraction to compare the decibels! Whoa…that’s a lot of math!
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- Is there really math in Let’s Get Loud?
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- We can make sound with straws.
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- The sound changes if we cover the bottom of the straw.
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- The pitch changes if we move the straw up and down in the water.
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- Different length straws have a different pitch. The longer the straw, the lower the pitch.
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- Everyone is checking out the different pitches.
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- We taped the ends of each straw.
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- We make sure no air can get out.
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- This was hard work!
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- We ordered our straws by length.
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- Everyone worked carefully!
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- What a great job!
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- Taping the straws together is tricky!
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- How cool are these pan pipes!
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- They are easy to play…
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- and each straw has a different pitch!
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- Let’s use a sound meter to see how loud our instruments are in decibels.
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- Wow! 87 decibels! That’s really loud!
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- How softly can we play? 30 decibels…shhh! That’s 57 decibels lower!
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- Maybe our voices can make the sound meter go higher!
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- 90 decibels…that’s really loud!
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- The grown ups helped us, but we can’t reach 100 decibels. That doesn’t mean we weren’t really loud!
