It makes a loud noise. Interesting thing bugles and horns. I believe nearly all peoples use or have used then, even conch shell. I saw on TV some old highly decorated military bod talking about his regiment stuck on a hill in the Korean war. At night surrounded and out number by Chinese forces, between actual fighting, battling with bugle calls. Are they still use in the field today?
This is quite interesting-
http://www.tapsbugler.com/Historyoft...theBugle1.html