Beautiful Singing Technique, But What Is It Called?

[Boff]

Since I saw the movie "300" I've been looking for a name for the singing technique or style the singer uses in the song "Message for the Queen". I suppose some would call it waling, but it's a special order of notes on special intervals, it's like a different form of vibrato or something like that.

You can hear it in 0:09, 0:18, 0:31, then the flute in 0:42, and then the singer in 1:07, etc etc. Does anyone know if there is a name for this excersice, or a name for the singing style in general (0:50-2:05)?

[StarCalledSun]

I found a YouTube video whose notes are very revealing, perhaps it might help. It seems like a Bulgarian folk song, and the style is very much like Eastern European folk music. (I spent a lot of time in Ukraine, and the national folk music is similar to that style, though perhaps with slightly less vibrato than than that performance.)

300 - Message for the Queen