Turn off Snapchat camera sound in Android
First of all snapchat will access your mobile camera application because it has the permission given by the developers,one thing you can stop this by those following statements...
 Go to setting
         Then apps
                   Then Snapchat
                           Then click on launch button
                                    Then go to running apps
                                             Then just choose Snapchat and select stop, by this u can stop service of this appp.