In-ear headphone device with active noise control

An in-ear headphone device comprising:

• a device housing;
• a loudspeaker;
• and
• a microphone,
• wherein said device housing is arranged to be fitted into an outer ear of a user such that said device housing extends into an ear canal of said user,
• wherein said microphone is configured to detect an in-ear audio signal, and wherein said in-ear headphone device is configured to process said in-ear audio signal to provide a noise cancelling audio signal to said loudspeaker,
• wherein said loudspeaker and said microphone are acoustically coupled within said device housing,
• wherein said device housing comprises an acoustic tube acoustically coupling said loudspeaker to said ear canal of said user when said device housing is fitted into said outer ear of said user, wherein said acoustic tube is associated with an acoustic tube axis extending into said ear canal, said acoustic tube axis defining a component projection plane perpendicular to said acoustic tube axis;
• wherein said loudspeaker comprises a loudspeaker diaphragm associated with a loudspeaker diaphragm projection area, wherein said loudspeaker diaphragm projection area is defined as a projection of said loudspeaker diaphragm along said acoustic tube axis onto said component projection plane,
• wherein said microphone comprises a microphone transducer associated with a microphone transducer projection area, wherein said microphone transducer projection area is defined as a projection of said microphone transducer along said acoustic tube axis onto said component projection plane,
• wherein said loudspeaker diaphragm projection area and microphone transducer projection area are non-intersecting in said component projection plane, and
• wherein said loudspeaker is associated with a loudspeaker axis and said microphone is associated with a microphone axis, wherein an axis angle between said loudspeaker axis and said microphone axis is in a range from 0 degree to 60 degrees.