Acoustic valve, and hearing device including such an acoustic valve

An acoustic valve for a hearing device, at least part of the hearing device being adapted to be positioned inside an ear canal, the acoustic valve comprising:

• a valve body defining a passageway extending through the valve body, the valve body defining a first aperture at a first distal end in an axial direction, and a plurality of second apertures in a radial side surface of the valve body;
• a seat member arranged inside the valve body, and delimiting part of the passageway;
• a shutter member arranged inside the valve body, and defining a shutter surface that is directed towards the seat member and is composed of a contact portion and a non-contact portion, the shutter member being moveable relative to the seat member to transition the acoustic valve between:
• an opened state, wherein the shutter member is at a distance from the seat member, and the passageway is open to allow sound to pass, and
• a closed state, wherein the contact portion of the shutter surface abuts the seat member, and the non-contact portion of the shutter surface blocks the passageway to restrict passage of sound therethrough;
• wherein a permanent or switchable magnet is embedded in a body of the shutter member, and in that the contact portion of the shutter surface is formed as a protruding structure that extends relative to the non-contact portion and towards the seat member, the protruding structure having a small width along at least one transverse direction to minimise a contact surface area between the contact portion and the seat member when the acoustic valve is in the closed state.