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by using the sonar system, FingerIO shows us how to introduce actions in smartphones or smartwatches without touching them.
touchscreens have been and are the protagonists of much of the advancement of mobile technology in the last decade. Spending clicking on physical keys, to make beats on a “giant” touch screen, he changed everything. Then came the tablets and convertibles. Nothing is inconceivable without its touch screen. The smartwatches have also shown that they can adapt well to the touch, however, despite advances that have improved greatly as voice dictation, text input remains problematic . FingerIO is a project that can solve this and other problems.
This is a movement tracker the fingers that can turn any space (including air) around smartphones or smartwatches an alternative to the screen on which device to control or enter text or commands surface. That space can be a table or paper that is posed, for example, a smartphone, but also the skin of the arm whose wrist portemos the smartwatch.
The good news is that it can work even if there are physical obstacles between the devices and finger, as would a pocket. This opens the door to, in the case of more active monitoring, can be controlled with gestures of some kind, without touching the screen, the smartphones .
How have this? Rajalakshmi Nandakumar and Vikram Iyer, University of Washington, have found that, transforming every device in a sonar system, can detect and track the movements of the fingers on a surface. To achieve this, make is issued an inaudible sound by the human ear, but microphones smartphone or smartwatch are able to “listen”.
Analyzing the echo produced when the waves come into contact with fingers, interpret, thanks to software, the ways that we try to draw, or just the kind of introduction we intend to carry out. Thanks to “Multiplexing Orthogonal Frequency Division”, OFDM, get the pinpoint accuracy (8mm) of that claim. Something that is problematic if, for now, is latency.