Noise cancellation enabled audio device and noise cancellation system

A noise cancellation enabled audio device, the audio device comprising

• a speaker which is arranged within the audio device and which has a preferential side for sound emission,
• a first cavity enclosing a first volume of air, where the first cavity is arranged at the preferential side for sound emission of the speaker, and
• an error microphone which is arranged within a second cavity within the audio device, wherein:
• the first cavity comprises a first opening to an outside of the audio device and the second cavity comprises a second opening to the outside of the audio device,
• the first and the second opening are both arranged on a side of the audio device which is arranged to face an ear canal of a user,
• the error microphone is directly coupled to the volume of air within the ear canal, and
• the second cavity is separated from the first cavity by a separating wall.