Sensation and perception - a study of Freddy Mercury

I'm not usually a consumer of S&P research nor am I a HUGE Queen fan but this article about a study looking at Mercury's voice was very interesting.  Say what you will about the man and/or his music - he was talented!  I believe Cindy Lauper and Mariah Carrey also have voices that span multiple octaves.  I wonder if they've done this kind of research on them?