Yeah, I remember the first time I heard one of those calls in person- It was about 15 years ago, and I was up visiting some friends in a little suburb, outside Indy. A bunch of us were sitting on the trunks of our cars shooting the breeze, and all of a sudden the bird cut loose a couple hundred feet away, and I almost jumped out of my skin!
I looked at the guy who lived there like "Wuuuuhh"? And he told me his neighbor a couple houses down had a pair of peacocks.
Now, I'd hear the sound plenty of times before, I think they used it in every old Tarzan movie ever made, but hearing it in person was a heck of a surprise, how loud it was and how far it carried.
BTW, I just threw in LMS to listen to the sound they were anylyzing and noticed it's pretty close to what I heard too- play the peacock call again, then jump to the sound on LMS. Again, the one I heard didn't have the peacock's repeating "Awoo" follow-ups.
Did they ever figure out what the LMS sound was?
-Sarge