let's start from the beginning.
a sonogram is meant to show you the main frequencies, the note and the harmonics.
The graphic datas it produces can definitely show the difference between two voices for instance.
You have to know that a note is nothing more than a frequency. Anything that can show you the frequency of your sound can show you the note. For instance, 440Hz (the musical reference) is an A (=la). For each octave you have to double the frequency. 880Hz is the next A.
-The first thing I told you (wav2midi then partiture) is a stupid thing to do. Of course this will work but you'll get weird note datas 90% of the time, not a real logic partiture. This is ok if you sing a song and then want to translate this into a partiture automatically for example, but this is still a quite stupid thing to do!
-The sonogram can instantly analyze which note you're producing. That's why I think that it's a much better way if you want to explain sound for a school project!
All you have to explain about this is that your voice produces frequencies. Those frequencies have a logic organisation. The main frequency is the note. Then the others frequencies are called harmonics. If you can see the frequencies, you can deduce the note. The more the frequency is fast, the more the note will be high.
I hope you understand more about it.
If you need anything more just ask me!
