There are several situations, such as when using the camera while hunting, where it is helpful to have the camera's beeps silenced.

On the ContourROAM, ContourROAM2, ContourROAM3, ContourGPS, Contour+, and the Contour+2 this can be done by changing a setting of the camera's configuration.  Open Storyteller and connect your camera to the computer.  Once Storyteller sees the camera, choose Tools -> Configure camera.  In the this tool you will find an option to turn the beeps on or off.  Make your selection and click Done.  Remove your camera and the change will take effect.  It will stay in the silent mode until you change this setting back.