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:

http://www.universetoday.com/61166/what-is-sound/

http://www.sciencekidsathome.com/science_topics/what_is_sound.html

https://www.youtube.com/watch?v=oElbMctAVlY&safe=active

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?)

15cm:	Made a sound.
10cm:	The sound was higher.
5cm:	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.

Conclusion:

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