From Mongolian throat singing to the grand opera houses of Europe and folk singing in the fields of Bulgaria, Trevor Cox examines how the human voice makes sound.

He hears of a study in Australia that suggests Wagner may have chosen specific vowel sounds to help female singers battle against vast orchestral forces. And how Mongolian throat singers took inspiration from the multiple sounds they heard in the wind.

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28 minutes

Last on

New Year's Day 2011 13:32 GMT