Seal assembly for an in-ear and in-ear

A sealing unit for an in-ear earphone comprising:

• a first annular portion configured to fit onto the in-ear earphone;
• and
• a second annular portion configured to be placed in a concha of a user;
• wherein the first annular portion has a diameter of between 8 and 25 mm;
• wherein the first annular portion and the second annular portion are peripherally connected together at an edge which is configured to surround a sound output region of a substantially flat sound output surface of the in-ear earphone when the sealing unit is fitted onto the in-ear earphone;
• wherein the second annular portion is in the form of a peripherally extending sealing lip extending from the edge to a second end of the sealing unit;
• wherein the sealing lip is made from a flexible material and configured so that, upon being fitted into the ear, it deforms so that it bears, in peripherally extending relationship with the second end, against the concha of a user so that the ear canal is sealed off at its outer end;
• and
• wherein, when the sealing lip is not fitted into the ear, each of an inside diameter and an outside diameter of the sealing lip steadily increases as a distance relative to the sound output surface increases from the edge to the second end of the sealing unit.