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DateDate: 1-09-2018, 06:02

We all remember cute gadgets for listening to spy movies built into the most common things. Korean scientists went further and created a more inconspicuous device
Experts from the National Institute of Science and Technology of Ulsan (Korea) have developed a nanomembrane - a transparent, almost invisible coating that can capture and reproduce sound.
 
It is worth noting that this is not the first "nanotechnology" speaker and microphone. Previously, similar elements were created on the basis of nanotubes and graphene, but they had a serious drawback in the form of distortion of sounds. New elements are created on the basis of silver nanofibers, which form membranes. As a result, all this looks like a transparent film that can be applied without harm to the skin. This membrane can work both as a speaker and as a microphone. During the demonstration, there was almost a real "magic": barely noticeable film lost the song La Campanella Niccolo Paganini. The principle of operation of the device is quite simple: if the film acts as a speaker, it connects via the wireless interfaces to the sound-transmitting gadget, and the passing current heats it and the surrounding air, thereby reproducing the sound. When working in the microphone mode, the reverse process occurs: the film converts the sound vibrations into a current, they are fixed and transmitted to a dictaphone or other device for recording.
This device is controlled by both voice and gestures. The percentage of correct recognition of device gestures is, according to scientists, about 98%. Even if you are not James Bond, you can use the film to remotely control your smartphone and other types of electronics.