Filter cigarettes of unit or multiple unit length are produced in a tipping machine wherein successive groups of coaxial plain cigarettes and filter rod sections are caused to roll within a channel bounded by surfaces at least one of which moves relative to the other. Such wind power installations of modern type, for example one of type E-40 or E-66 from Enercon are usually equipped with a lightning protection system which is known for example from DE 44 36 197. The method further comprises transmitting one of the n audio streams to the n chat participants such that a chat participant of each of the n chat participants receives an audio stream excluding the audio component associated with the chat participant.