What kind of effect — if any — does loudness have on articulation? This question was bugging researchers at the University of Freiburg so much, they grabbed a world-class opera singer and tossed him into an MRI so they could analyze the voice at work. Baritone Michael Volle was the willing subject, and as he sang the aria “Oh Du, mein holder Abendstern” from Wagner’s Tannhäuser, the scientists were able to observe the workings of the human voice in real time.

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