Thursday, May 8, 2014

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….The sound will go up. It’ll go a little bit higher every time I cut the straw shorter.

Materials needed: A straw and scissors.

Experiment (procedure):
e.g. Step 1 - Crease straw on one end.

Step 2 - Cut creased straw into triangle shape. Blow air into the cut end.

Step 3 - Listen to the sound it makes. Record it.

Step 4 - Cut straw shorter.

Step 5 - Blow on cut end. Listen and Record.

Data (What happened?)
Made a sound.
The sound was higher.
The pitch was even higher.

Observations: At first, it didn’t make a sound, but then I gently blew on it, and it straight away made a sound. For every piece of straw I cut off, the pitch got higher, and squeakier. It sounded exactly like a birthday party horn. Even though there were two materials needed, it was pretty complex.


My hypothesis was right because the sound went a little bit higher every time I cut the straw shorter.

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