How to Disable the Camera Shutter Sound on a Motorola
Some Motorola phones have a little dial which slides in from the left-hand side of the screen. The loudspeaker icon represents the shutter sound. Just tap it to enable or disable it.
Other Motorola phones, like the Moto G4, just use the master volume controls to set the camera shutter sound. Simply set your phone to silent, do not disturb or vibrate to ditch the noise.