This paper describes in-car auditory signals and compares them with auditory signals other fields of application. A lot of systems, e.g. navigation, in-car interface system or the on-board computer use short sound messages to give feedback to the driver. The aim of the study is to examine auditory signals of existing cars. Such signals can be used to convey information and also an emotional relation towards the brand. Therefore, physical parameters of these signals are described and some of the signals are tested in a usability test. The result shows that the signals have a simple design. They do neither convey information nor let anybody identify with the brand. Furthermore, they have a high potential for improvement with new sound generating systems. Through comparison with medical equipment and robotic systems concrete input for development can be identified.