We have some new videos coming up after the announcement of Sony A9 camera. In the video you can hear the mechanical shutter sound of the new A9 camera. While shooting a 20fps the electronic shutter gets activated, but the camera do create a artificial shutter sound via speakers which can be switched off if required (optional)
Take a look at Sony A9 Announcement Page here and Sample Images here | Pre-order page is now LIVE at B&H store