Method for outputting information by means of synthetic speech

The invention concerns a method for outputting information by means of synthetic speech during a voice communication which is provided over a multidirectional connection between a communication device (2) of a first subscriber and a communication device of at least one second subscriber, wherein by using a vehicle information system (14) with integrated speech synthesis system (5) present in a motor vehicle, at least one item of information which is delivered by the vehicle information system (14) and is selected by the first user via an input unit (8.1) is converted into a speech synthesis signal by means of the speech synthesis system (5). In this process, the speech synthesis signal is mixed with a voice signal that can be input via a microphone (1), and is delivered as a speech output signal to the communication device (2), or the speech synthesis signal is delivered as a speech output signal to the communication device (2) and the speech output signal is sent via the multi-directional connection to the communication device of at least the second user.