Stretchy Speakers
A transparent, stretchable film of carbon nanotubes made by Shoushan Fan at Tsinghua University in China can act as a loudspeaker even when mounted on a waving flag. Overlaid on a computer monitor, the film could eliminate the need for separate speakers. Current running through the nanotubes heats the film, creating sound waves in the air through the thermoacoustic effect.
Credit: American Chemical Society
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