Acoustic valve for hearing device

An acoustic valve comprising:

• a housing having an acoustic inlet, an acoustic outlet, and an acoustic passage between the inlet and the outlet;
• a first electrical coil disposed in the housing and configured to generate a magnetic field when the first electrical coil is energized by an actuation signal;
• a second electrical coil disposed in the housing and configured to generate a magnetic field when the second electrical coil is energized by an actuation signal;
• an armature movably disposed in the body member between the first and second electrical coils and between a first surface and a second surface,
• the valve having a first stable state wherein the armature is positioned against the first surface when the first and second electrical coils are not energized, and the valve having a second stable state wherein the armature is positioned against the second surface when the first and second electrical coils are not energized, the first surface and the second surface are on opposite sides of the armature,
• the armature movable between the first stable state and the second stable state when at least one of the first and second electrical coils is energized,
• wherein the acoustic passage is more obstructed when the armature is in one of the first stable state or second stable state than when the armature is in the other of the first stable state or the second stable state.