Richard Feyneman (sp.?) the guy who discovered it was a faulty O-ring that downed one of our space shuttles, had this lifelong dream to go to Tuva and hear the Tuvans ululate. He died before the then-USSR government would give him permission. His assistant went there to honor the obsession, and heard 'em. I heard them in concert at Stanford U. with the Kronos Quartet a few years ago. The sound is not very melodic--it's more like a drone, as I recall. I think there is a recording if you are impelled to research further. Let me tell you--we poets lean on poetic license a lot in our search for the right words!