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Where Sound Meets Flexible Electronics

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Source : Blog in Physics Central, May 24, 2017

Link:
http://www.physicscentral.com/buzz/blog/index.cfm?postid=507964176337673846

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Voice-securing your ATM card. Talking to your newspaper over coffee. Projecting your voice to a room full of people using only a thin, lightweight loudspeaker that fits in your pocket. With new research published last week in the journal Nature Communications, a team of scientists from Michigan State University and Georgia Institute of Technology has opened the door to these possibilities.


Last week, the team introduced the first ultrathin, flexible, scalable device that can convert mechanical energy to electrical energy and vice versa—acting like both a microphone and a loudspeaker. To showcase the audio capabilities of this device, the researchers created a flag that can blow in the wind while blaring music, a paper-thin sheet that can record a symphony, and a very sensitive voice recognition security key.


These applications are based on something called a ferroelectret nanogenerator, or FENG. Introduced by researcher Nelson Sepulveda’s group (Michigan) in late 2016, FENG is a flexible, paper-thin generator that was originally designed to harness human motion for generating electricity. When you push down on a FENG, the “pushing” energy is turned into electrical energy that researchers have shown can power items like keyboards, LED lights, and touch-screens. Now, the team has shown, its applications go beyond power generation.


To read more (which gets into technical details) please visit the link supplied at the top of the post
 
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