A method is provided for automatically activating an in-cabin camera system whenever the control system determines that the volume level of sounds detected within the car are in excess of a preset sound level, thereby allowing the driver under certain circumstances to monitor occupants of the rear portion of the passenger cabin without stopping the car or turning around in their seat. The system can be configured to analyze the detected sounds and compare those sounds to preset sound patterns, thus helping the system to distinguish between routine background noise and any sounds that indicate that activation of the in-cabin camera system is warranted.