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.
Interpol investigating stolen passports on missing flight
Susan Sarandon 'very excited' about daughter's pregnancy