Digital cameras are big on sound effects. Some cameras play a little ditty when the camera is turned on, make a beeping sound to tell you about an adjustment, and emit a little shutter sound when you take the picture. These sounds may not be appreciated in every picture-taking setting, though. To quiet your noisy digital camera:
Check your camera’s documentation, such as the manual.
Make sure your camera allows you to mute (or, at least, turn down the volume on) those sound effects somewhere in its menu.
Find your camera’s sound effects menu option.
The camera’s documentation can help you here, too.
Make adjustments to the sound effects settings.
If you can’t mute the camera all together, select the quietest setting available.