Скачать или смотреть Heavy Metal Singers are Just Big Babies

(Inside Science) -- Music, for some, is most fully expressed in the form of jazz: distinctive, bent, syncopated improvisation; for others, it is country: patriotic steel twangy ballads; for some it is hip hop: lyrical, sampled, turntable beats; for others still, it is classical: refined, symphonic, orchestral homophony.

And yet there is a whole other subclass of music lovers among us for whom its proper expression is a different beast entirely -- arrogant, angry, aggressive abuse.

They call it heavy metal.

A longstanding mystery has persisted around heavy metal singers for years: How do they do it -- all that screaming, for hours at a time -- and then get off the stage and talk normally? How come they never damage their vocal cords? Now, using high-speed imaging, one San Francisco doctor thinks he found the secret.

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