Abstract: Some demonstrative embodiments include a muffled rack configured to maintain at least one electronic device, wherein the electronic device has an inlet to receive air for cooling the electronic device and an outlet to discharge the air. The muffled rack may be configured to muffle noise emanating from within the rack through an air inlet and/or an air outlet of the rack. Other embodiments are described and claimed.

Abstract: Soundproofing a rack by installing at least one duct on at least one panel of the rack, or as part of the side panels of the rack, or is mounted inside the rack as a drawer in such a way that air can flow outside from the rack causing air to flow from the rack through the duct, and providing an active noise control (ANC) system within the duct. Passive noise control may also be provided in the duct. At least one fan may be provided at an inlet of the duct. Fan speed may be controlled, in response to a climactic condition within the rack. The duct may comprise a back panel which is added on or a replacement for an existing back panel of the rack. A muffled inlet may be provided on another external surface of the rack.