Trumpet information?

i need some info on the trumpet for my science assignment


. what is the frequency of a trumpet


. define pitch


. how do you change the pitch


. how do increase the loudness

Trumpet information?
http://hyperphysics.phy-astr.gsu.edu/hba...





Here's a website with all the info you need, but here is the estimated frequency of a low C





238.4 Hz