Patent ID: 8295505

Claim:
An earphone for being connectable to a mobile communication device comprising a sound source and said earphone comprising: a connection device for connection to the sound source; a housing being shaped and configured to cover an external auditory meatus of a user when the earphone is worn, and for accommodating a loudspeaker element configured to direct emitted sound into the external auditory meatus and being connected to the sound source through audio signal lines; the housing further comprising a channel extending between an inner end facing the external auditory meatus when the earphone is worn, and an outer end facing a surrounding atmosphere when the earphone is worn; and closure means arranged for being switched between a closed state in which said channel is closed, and an open state in which said channel is open to admit sound from the surrounding atmosphere; wherein said closure means is positioned at the outer end of the channel and further comprising a controllable membrane covering the opening at the outer end of the channel and further said controllable membrane is connected to a switch for switching said controllable membrane between two states in which the controllable membrane has different acoustical characteristics in dependence of control signals received from said mobile communication device.