This is a speaker, believe it or not (Photo by Eliza Grinnell, SEAS Communications)
Jeong-Yun Sun (left) and Christoph Keplinger (right), two scientists working on the transparent speaker project believe ionic conductors could potentially offer quite a few advantages over typical conductors used today (Photo by Eliza Grinnell, SEAS Communications)
Audio speakers are showing up in a variety of unusual forms these days, from the incredibly tiny to the eye-catchingly bizarre, but a research group at Harvard University may have trumped them all with a new one that's as clear as glass. Scientists at the college's Engineering and Applied Sciences branch recently built a flexible speaker out of ionic gel that is almost invisible to the naked eye and can produce high-quality sound ranging across the full audible spectrum. In doing so, they also provided a proof of concept for electronics that can transfer electric signals in a similar manner to the human nervous system.
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