An earmold having an earmold shell, the earmold shell having a first end facing a tympanic membrane when the earmold is worn by a user, and a second end facing toward a surrounding of the user when the earmold is worn by the user, includes: a receiver configured to provide an audio output signal; a receiver channel coupled to an output of the receiver and extending to a receiver opening in the first end; and a vent channel coupled to the receiver channel through a first vent port, the vent channel having a vent opening in the second end; wherein the receiver channel comprises a closing element, the closing element comprising a first magnetic member, wherein the closing element is configured to cause the first vent port to be open when in a first state, and to cause the first vent port to be closed when in a second state.