Hearing aid comprising an activation element

A hearing aid adapted for being worn by a user, the hearing aid comprising:

• a housing configured to enclose components of the hearing aid, wherein the housing comprises an outer surface facing the environment and an inner surface facing the components of the hearing aid;
• a forward audio signal path for receiving an audio signal, processing the audio signal and providing an output signal in dependence of said processed audio signal;
• a multitude of mechanical activation elements for controlling functionality of said hearing aid, wherein each of the mechanical activation elements is constituted by or comprises a push button, wherein each of the multitude of mechanical activation elements is located on the outer surface of said housing without penetrating said housing and emits an acoustic signature when activated, the acoustic signatures emitted by each of the multitude of mechanical activation elements being different from one another;
• a vibration sensor configured to capture the emitted acoustic signatures by picking up acoustic vibrations in air or mechanical vibrations of said housing and to provide a sensor signal indicative thereof;
• a controller for analyzing said sensor signal for occurrences of said acoustic signature to thereby identify and generate a specific control input for controlling said functionality of the hearing aid;
• and
• a memory comprising reference acoustic signatures, each of the reference acoustic signatures being recorded, in advance of its use, for an intended placement of each of the multitude of mechanical activation elements on the outer surface of said housing,
• wherein the controller is configured to determine whether the emitted acoustic signature originates from one of the multitude mechanical activation elements.