Help With Science Fair Project

[crdto7]

Posted this in 1.2 for Mac, then I realized my computer could download 1.3 (it's school issued and I cannot download most applications), so I moved it here. Any help at all is tremendously appreciated:

I am doing my high school science fair project on the differences between different types of acoustic guitar strings. The only problem is, I know very little about how to evaluate those differences. I originally planned to use GarageBand to test the the sustain of the note (open G string), but then I discovered Audacity, which seemed much more in-depth. However, I know next to nothing about wavelengths, frequencies, etc., so I am kind of stuck. I guess my question is: How could I measure the effect different types of guitar strings have on a guitar's tone, sustain, or frequency?

[kozikowski]

We'll pretend you didn't write this one. I responded to the other one.

koz