## Sounds of Music C

quizbowl
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### Re: Sounds of Music C

great idea: a kid with perfect pitch playing a kazoo.
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zyzzyva980
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### Re: Sounds of Music C

A good idea, but you have to make the instrument yourself and if you're going to spend your time building that you might as well build something with better sound quality.
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paleonaps
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### Re: Sounds of Music C

No, kazoos are awesome. Great sound quality.
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AlphaTauri
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### Re: Sounds of Music C

great idea: a kid with perfect pitch playing a kazoo.
Technically, that is legal by draft rules, but your perfect pitch has to be absolutely perfect, because I think they can ask you to play any note within the required range and judge it for accuracy. Along the lines of what zyzzyva said, if you have months to prepare, why not build something that can consistently play notes in tune, without having to rely on someone's perfect pitch? Of course, if it's the week before competition and you have nothing to lose, go ahead.
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paleonaps
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### Re: Sounds of Music C

Yes, a kazoo is a gamble. I wish I knew my great-great grandparents- they were instrument makers.
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Flavorflav
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### Re: Sounds of Music C

b/c alot of ppl make guitars or violins and they want a more variety
making a string instrument is alot easier than making drums
At the competitions I have been at, percussion instruments were most common - chimes, xylophones, and there's always a couples of kids with a tray of glasses or test tubes filled with water to various heights.

paleonaps
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### Re: Sounds of Music C

I would imagine that there would be a lot of those, because they are pretty simple to make.
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blue cobra
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### Re: Sounds of Music C

I'm having some trouble with some equations.
$I=\frac{P}{A}$

$\beta = 10 log \frac{I}{I_0}$

$A = 4 \pi r^2$
EDIT:
I = intensity
I_0 = threshold of hearing*
Beta = relative intensity
P= power
A = Area

*I think so. I'm reading from a photocopy, and it's cut off.
/EDIT
A jet plane is found to have a relative intensity upon takeoff of 110 dB. Calculate the intensity of the sound the jet makes. Ans. 0.10 W/m^2
I had a start to this, but looking back it doesn't look correct. It would be greatly appreciated if someone could explain how to solve these types of problems.
Last edited by blue cobra on August 24th, 2010, 5:31 pm, edited 1 time in total.
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paleonaps
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### Re: Sounds of Music C

That post has discouraged me from doing this event. I don't like math.
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ichaelm
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### Re: Sounds of Music C

I don't understand those equations, but in order to find the intensity of anything, including light and sound, you must know how far away you are from the source. So it seems like you don't have enough information to solve it. I may be looking at this the wrong way, because that's the extent of my understanding.