| 摘要 |
<p>A device (7) for producing mechanical vibrations has a component (19) displaceable under the action of a magnetic field and drive means (14) driving the component (19) and energy supply means (21) for feeding energy in the form of an electrical supply signal (SIG) to the drive means (14), it being possible to set the component (19) in motion in accordance with a to-and-fro displacement movement with the aid of the drive means (14) and the energy supply means (21) being designed to produce a supply signal (SIG) that is variable in its frequency.</p> |
