The Silencer automatically mutes infrared-controlled entertainment devices (e.g., televisions and stereos) during an alarm sequence, allowing for quiet and clear audio comprehension of the MCU pre-announcement and subsequent dispatch transmissions. The Silencer is frequently used in high-noise areas such as fitness rooms, dayrooms, dining rooms and kitchens. Once the alert is complete, the Silencer automatically restores the stereo and television equipment back to their prior audio settings. The Silencer can be used in conjunction with the Video Messenger.