Thursday, May 8, 2014

Straw Oboe Science Experiment

Science experiment:

Question: What will happen to the sound if I cut the straw shorter and blow through it?

Links to research about Sound:
Hypothesis: (What do you think will happen?) e.g. I think that the sound will go higher
Materials needed:
Straw, scissors
Experiment (procedure):
Step 1: Crease the straw 2-3 cm on one end
Step 2 - Cut the creased end of the straw into a triangle shape about 1.5cm long.
Step 3 - Put the triangle shape into your mouth and blow
Step 4 - Cut the end shorter and shorter
Step 5 - Listen to the sound it makes

Data (What happened?)
Straw length
Results
Long
Low, deep sound
10 cm
Higher, lighter sound
5 cm
Even higher than before. Very high pitched.

Observations:
The data shows that the sound got higher and higher as it got cut. It turns out that my hypothesis was correct. When the straw was at it’s longest, it made a low sound. At 10 cm, it was higher, but still low. But at 5 cm, it was very high pitched. It was harder to blow than at 10 and 15 cm.

Conclusion:
My conclusion is that when you cut the straw shorter and shorter, the pitch goes higher and higher.

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