Transparent Artificial Muscle Plays Music to Prove a Point, Harvard University Study

Published: Aug 30, 2013

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In a materials science laboratory at Harvard University, a transparent disk connected to a laptop fills the room with music -- it's the "Morning" prelude from Peer Gynt, played on an ionic speaker. No ordinary speaker, it consists of a thin sheet of rubber sandwiched between two layers of a saltwater gel, and it's as clear as a window.

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