Bone-Rattling Sound: New Speakers Made from Cow Femur

By Christopher Mims Bones have amazing electrical conductivity properties and, as one artist recently found out, can vibrate at the right frequencies to make a lovely macabre speaker set. Turned on its head, bone's response to physical stress can be used to produce music—or at least musical tones.

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Bone-Rattling Sound: New Speakers Made from Cow Femur