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1. An adaptive noise-cancelling headphone comprising:
an earcup housing having a driver positioned therein for outputting sound to a user's ear, wherein the driver is positioned between a front portion of the housing dimensioned to encircle the user's ear and a back portion of the housing; an active noise control assembly integrated with the earcup housing, the active noise control assembly having an ambient microphone capable of detecting an ambient noise outside of the housing and an error microphone capable of detecting an earcup noise inside of the housing, and wherein based on the ambient noise and the earcup noise, active noise cancellation within the headphone is either enabled or disabled; and a passive noise control assembly integrated with the earcup housing, the passive noise control assembly having an acoustic valve associated with an acoustic vent formed within the earcup housing, the acoustic valve capable of being modified between an open configuration to decrease sound attenuation and a closed configuration to increase sound attenuation in response to the detected ambient noise so as to improve an acoustic performance of the earcup.
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