english: Now, when they tried this on an iPhone 3GS, this is a graph of the perturbations that were created by the typing, and you can see that it's very difficult to tell when somebody was typing or what they were typing, but the iPhone 4 greatly improved the accelerometer, and so the same measurement produced this graph.
non_english: Najskôr to skúsili so smartfónom iPhone 3GS. Tu je graf odchýlok, ktoré vznikli pri klepaní do klávesnice. Sami vidíte, že je ťažké z neho vyčítať, kedy a čo niekto písal. Ale v smartfóne iPhone 4 akcelerometer podstatne zlepšili. Toto je graf tých istých odchýlok. Na rozdiel od prvého,