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Thursday, May 8, 2014

Science experiment - Straw Oboe


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….
I think the sound of the straw will get higher pitched if cut shorter

Materials needed:
Straw and Scissors

Experiment (procedure):
e.g. Step 1 - Crease the straw about 2-3cm on one end

Step 2 - Cut the creased end of the straw into a triangle shape and blow

Step 3 - Listen to the sound it makes and record

Step 4 - Cut the straw shorter to see what it will sound like

Step 5 - Blow on cut end and record

Data (What happened?)
Long 15cm
Makes a sound low-ish sound
10cm
The pitch went a little bit higher
5cm
The pitch was even higher than before

Observations:
Long - 15cm - The sound is very low
10cm - The pitch went a little higher and sounded like a party horn
5cm - It was really annoying and it was very high pitched

Conclusion:
My hypothesis was right because the sound of the straw will get higher pitched if cut it shorter.

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