According to the invention, the spring-mass system is configured such that its resonance frequency is outside the frequency band within with a person is sensitive for tactile sensation, i.e. for “sensing” mechanical vibrations. Typically, the cut-off frequency that can still be detected by the skin receptors for haptic feedback and/or for tactile sensation of a person lies at a few 100 Hz, for example 500 Hz or 400 Hz or the like. According to the invention, the frequency spectrum of the mechanical pulse at the (first) resonance frequency (resonance base frequency) and/or at one of the harmonics of the resonance frequency does not have frequency components. This is expressed, for example, by the fact that the power density spectrum above the cut-off frequency is energy-free or substantially energy-free. This means that there is no excitation of the spring-mass system at the resonance frequency.

As already described above, the cut-off frequency can be 300 Hz or 250 Hz or 200 Hz.

In a further expedient embodiment of the invention, the resonance frequency according to the following formula can be defined by selecting the mass and/or spring constant of the spring-mass system:

$f$