The present invention relates to a method for implanting producer cells into the mammalian brain. Provided in the housing is a chamber that is divided by a diaphragm into a pump chamber and a drive chamber that is acted upon by impulse pressure fluctuations during operation of the internal combustion engine. The hitting member is attached on the pivot shaft to move radially at a predetermined distance from the pivot shaft and configured to pivot between a silent position and a sound producing position.