Headphones could be made with built-in microphones, touch-sensitive buttons, motion sensors and even heart-rate monitors. But researchers have found a method to bring each one of these features to any existing couple of standard headphones, irrespective of age or cost. The technique could replicate the […]

The vibrations from an iPhone’s ringtone can be used to measure the viscosity of a liquid, that could allow it to identify whether water is polluted or to test for kidney conditions and pregnancy by measuring the levels of protein or hormones in urine. Yandao […]