acoustic signal devices, optical and acoustic combination devices and signaling devices for hazardous areas are available. In this way, users can ensure that they find exactly the right signaling solution [...] between the signaling devices can be specified. The customer thus receives a kind of installation plan for the signal devices, in which the installation point, e.g. a pillar, or the complete signaling area is [...] number of operating signals at the workplace. Due to this sensory overload, it is becoming increasingly difficult for them to clearly perceive and correctly classify alarm signals. Planning is made even