Apple forced to rip off any mobile phone can achieve a pressure sensor

　　Despite the pressure sensing operation later released on iPhone 6s and did not lead to particularly profound change, but Apple this innovation is still too difficult because few manufacturers to follow. But now an invention from the University of Michigan allows any smartphone can spend pressure sensing operation, you just need to install a piece of software, rather than like the iPhone screen to add a layer of the sensor.

　　IPhone and complicated process compared to the University of Michigan this invention only requires different mobile phone parts (all phones have) - a microphone and speakers. The software will let the phone continue to issue 18kHz frequency sound waves, which frequency sound waves but the human ear can not distinguish microphone can be no obstacle detected. When the user presses the screen with a finger, a slight change in tone, the tone changed when the magnitude of the weight becomes large, and this time the microphone will pick up the appropriate voice, and use software to convert the instruction. In this way you can simulate the weight of the screen or tap the user, in order to make pressure-sensitive screen and the same reaction.