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This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?

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What makes someone sound sexy?

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(sound)

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To get a scientific viewpoint, researchers gauged volunteers' responses to different voices.

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The conclusion: voices considered attractive send messages about body size.

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The work is in the journal PLoS ONE.

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In the animal kingdom, sound indicates size and intentions.

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For example, a rough and low-frequency call suggests the vocalizer is large and aggressive,

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while a clearer, higher frequency signals a small, non-threatening animal.

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In the study, researchers adjusted a variety of voices to correspond with different body sizes.

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To do so, they synthesized completely artificial voices, and recorded sentences before varying the pitches and resonance.

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When volunteers listened to the sound samples, men preferred higher-pitched female voices like this one

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(voice clip),

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which suggest a smaller body size.

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Low-frequency male voices that signaled a large body size (voice clip), were attractive to females.

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Interestingly, breathiness made both male and female voices more desirable.

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It certainly explains the enduring popularity of

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(audio of Marilyn Monroe singing to JFK).

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Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwick.

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