RE: diaphram
purr- gargle back of throat like your trying to slowly cough up a loogie with lips like your going to whistle....or vibrate lips
cluck- pick, peck, puck, putt
putt- sharp clucks ( not really recommended as this is an alarm call of danger)
cutting- long quick series of the above for clucking with different pitches
yelp- shirt, purt, chuck, cholk, keeyolk
kee kee run (for fall)- pee pee pee followed by a couple short yelps
this is how I do these calls, others may have other keywords...
hope it helps