MSU Engineering Researchers Turn Flag Into Loudspeaker

EAST LANSING — A paper-thin, flexible device created at the Michigan State University College of Engineering not only can generate energy from human motion, it can act as a loudspeaker and microphone as well, nanotechnology researchers reported May 16 in the scholarly journal Nature Communications.

The audio breakthrough could eventually lead to such consumer products as a foldable loudspeaker, a voice-activated security patch for computers, and even a talking newspaper.

“Every technology starts with a breakthrough and this is a breakthrough for this particular technology,” said Nelson Sepúlveda, MSU associate professor of electrical and computer engineering and primary investigator of the federally funded project. “This is the first transducer that is ultrathin, flexible, scalable and bidirectional, meaning it can convert mechanical energy to electrical energy and electrical energy to mechanical energy.”

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