EARPHONE

An earphone (10) comprising: an acoustic driver (116); a housing (16) containing the acoustic driver, the housing including a front chamber (114) acoustically coupled to the acoustic driver and a nozzle (126) acoustically coupled to the front chamber; and an ear interface comprising: a body portion (12) that fits beneath the tragus and antitragus and has a surface (13) that rests against the concha of a user's ear when worn by the user, an outlet (15) arranged to fit inside the user's ear canal entrance so as to seal it with minimal pressure, the outlet being coupled to the nozzle of the housing and providing a passageway for conducting acoustic energy from the acoustic driver to the user's ear canal, and a positioning and retaining structure (20) terminating at an extremity (35) and arranged for contacting the antihelix of the user's ear along a length (40), and the extremity of the positioning and retaining structure contacts the base of the helix of the user's ear.