Respiratory interface

A respiratory interface comprising:

• a mask frame,
• a seal module that couples to the mask frame and that is configured to interface to a mouth and/or nose of a user to deliver respiratory gases to the user, and
• a magnetic coupling system that magnetically couples the seal module to the mask frame,
• wherein the magnetic coupling system comprises at least one magnet associated with one of the seal module or the mask frame and at least one other magnet or ferrous part associated with an other of the seal module or the mask frame that are attracted to one another by a magnetic attraction force,
• wherein one or both of the at least one magnet and the at least one other magnet or the ferrous part is elastically moveably mounted by an elastically movable mount comprising a stretchable material and configured such that when the seal module and the mask frame are brought towards one another, at a break point at which the magnetic attraction force exceeds an elastic retractive force of the elastic elastically movable mount, one or both of the at least one magnet and the at least one other magnet or the ferrous part moves within and relative to a balance of a respective one of the seal module and the mask frame in a manner that stretches the elastically movable mount before the elastically movable mount recovers as the seal module and the mask frame are fully coupled,
• wherein an audible sound is produced on coupling and uncoupling of the magnetic coupling system,
• wherein, on coupling of the magnetic coupling system, the at least one magnet or the at least one other magnet or the ferrous part moves relative to the balance of the seal module or the mask frame in response to the magnetic attraction force and the audible sound is produced by direct or indirect physical contact between the at least one magnet and the at least one other magnet or ferrous part, which contact stops the movement of the at least one magnet or the at least one other magnet or the ferrous part,
• wherein, on uncoupling of the magnetic coupling system, the at least one magnet or the at least one other magnet or the ferrous part moves relative to the balance of the seal module or the mask frame in response to the elastic retractive force and the audible sound is produced by direct or indirect physical contact between the at least one magnet or the at least one other magnet or ferrous part and the seal module or the mask frame, which contact stops the movement of the at least one magnet or the at least one other magnet or the ferrous part, and
• wherein the audible sound is produced only by the at least one magnet or the at least one other magnet or the ferrous part directly or indirectly audibly striking one another or one of the seal module or the mask frame.