Speakers and microphone
A newspaper talking to you?
A handkerchief that serves as a microphone? Sounds quite off-balance. Would be possible today.
Thanks to the so-called feng film. It can produce and record sounds.
Scientists around Professor Nelson Sepulveda from Michigan State University had initially developed the film, however, in order to convert mechanical energy into electricity.
And this can be the film even if you bend it.
Nanotechnology makes this possible. The team around Sepulveda last year presented a cordless keyboard that generated the power for sending the letters to the screen at every touch print.
Electrically charged ions are deposited the paper thin electronic high-tech material is made up of different layers such as silicon, silver or special plastics.
In between, electrically charged ions are deposited.
Thus a ferroelectret nanogenerator is formed from an ultra-thin flat sheet. His inventors called his abbreviation Feng and that is after all synonymous for a Chinese lucky symbol.
And the researchers were lucky. Not only does Feng kinetic energy can convert into electrical and vice versa.
The material can also record and reproduce sounds, as the American inventors now report in the journal Nature Communications.
Flag becomes the loudspeaker But the video shows how the high-tech material Feng can be used to make a loudspeaker from a flag.
To this end, the scientists built Feng into a flag, connected an amplifier, and let music out of the fabric blow. According to.
The thin film is also suitable as a microphone, as the researchers found: They developed a sound recognition program, which served as a computer barrier.
Feng was used as a microfone!
And proved to be receptive to vibrations, could distinguish voices from each other. In the test, the system successfully prevented the access of strangers to the PC.
According to Sepulveda, the film can also be used simultaneously as a microphone and loudspeaker.
Because this is a very thin film, the researchers were able to use the talking daytime as a means of application.
Special textiles made of piezoelectric fibers Just as imaginable: in Japan, researchers from the Teijin textile group and Kansai University are working on special textiles made of piezoelectric fibers, which are also suitable for data collection.
Surgeons who carry these special textiles of piezoelectric fibers could use robots to remotely control patients who are hundreds of kilometers away.
They perform movements that the robot imitates one by one.