South Korea says new regulations will ban silent smartphone camera apps that can capture photos without making a shutter click sound. Such silent camera apps have led to an increase in clandestine photos, such as so-called under-skirt photos of women, being taken without the subject being aware they\'ve been photographed, The Korea Times reported Friday. So-called silent camera apps override a smartphone camera\'s normal shutter sound and make it possible to take pictures with almost no sound. The new regulations will require apps to create a sound even when in \"preview\" mode prior to the photo being snapped, the Times said.