Abstract: A dome for retaining a hearing device or hearing device part in the ear of a user wearing the hearing device. The dome includes, or is composed of, an indicator material that changes perceptibly as a function of a duration of use of the dome. Based on the change in the indicator material, it is possible to ascertain that a recommended maximum duration of use of the dome has been exceeded.

Abstract: A dome for retaining a hearing device or hearing device part in the ear of a user wearing the hearing device. The dome includes, or is composed of, an indicator material that changes perceptibly as a function of a duration of use of the dome. Based on the change in the indicator material, it is possible to ascertain that a recommended maximum duration of use of the dome has been exceeded.

Abstract: There is provided a power transmission device for contactless power transmission, comprising a transmitter device and a receiver device, wherein the transmitter device has a first transmitter with a first transmitting frequency and at least one second transmitter with a second transmitting frequency, the second transmitting frequency is different from the first transmitting frequency, and the first transmitter is galvanically separated from the second transmitter, wherein the first transmitter has a first axis of symmetry and the second transmitter has a second axis of symmetry, and the first axis of symmetry of the first transmitter and the second axis of symmetry of the second transmitter are at least approximately coincident in a transmitter axis of symmetry, and wherein the receiver device has a first receiver associated with the first transmitter and a second receiver associated with the second transmitter.