A refrigeration appliance includes an insulated cabinet having a side wall and a machine compartment positioned adjacent the side wall. An aperture is provided through the first side wall to allow air to flow into the machine compartment. An air vent is provided at the exterior surface of the side wall so as to cover the aperture. The air vent having a first set of louvers. A sound barrier is provided at the interior surface of the side wall at the aperture. The sound barrier has a second set of louvers, where the second set of louvers are positioned with respect to the first set of louvers such that there is no mechanical access to components in the machine compartment through the air vent, and such that sounds from within the machine compartment are dampened while still allowing air to flow through the air vent.