1. An enclosure, comprising: a noise cancellation portion, comprising a controller unit, operatively coupled to one or more error microphones and a reference sensing unit, wherein the controller unit processes signals received from one or more error microphones and reference sensing unit to reduce noise in an area within the enclosure using one or more speakers; an external voice input apparatus comprising a microphone operatively coupled to the noise cancellation portion, wherein the external voice input apparatus is configured to receive external voice signals and reproduce the external voice signals on the one or more speakers, wherein the external voice signals are external to the area within the enclosure; and wherein the external voice input apparatus comprises a sound analyzer configured to analyze the external voice signals and determine whether the external voice signals are desired speech signals and reproduce the desired speech signals on the one or more speakers.