I shouldn't name drop, but hey, I'm going to! I interviewd Mick Hucknall for a musicians' magazine, about vocal technique. He told me that singers starting out always sing from the throat, and it gets rerally sore after a few days, and then goes completely. Professional singers learn to sing from their diaphragm, somehwere in the chest area, which causes no strain on the vocal chords. This technique allows singers to sing, shout, and scream with minimal damage.