Abstract: Spring assembly as part of a vibrator for a bone anchored hearing aid, wherein the spring assembly comprises a suspension spring having a first end immovably connected to a mass of the vibrator and a second end immovably connected to a coupling attachable to a user's skull bone and comprised by the vibrator, wherein the spring assembly comprises an adjusting means adapted to adjust a spring rate of the suspension spring between a first spring rate and a second spring rate, the first rate being higher than the second rate, so as to move a resonance peak of the vibrator.

Abstract: A listening device having an ear hook adapted for carrying the device behind the ear of a user and magnetically operated compression parts including a subcutaneous part and a device part is provided, where further a vibrator is provided and adapted to vibrationally energize a skin portion through an output coupler, wherein the hook carries the weight of the listening device and the magnetic compression parts ensures compression between the output coupler and the skin portion.