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„Imagine, you stay overnight in a hotel and it seems somewhere happened something threatening or even dangerous. Nobody tells you what to do. Only a siren howls. The guests stand on the corridors and ask themselves how to react. “

Something similar could also happen at many other places, such as shopping stores, administration buildings, industrial plants, stations, airports as well as schools and hotels. For this reason a reliable acoustic security system for rendition of necessary information is indispensable.

All involved persons are safely guided through the danger zone by task-force-steered or automated instructions for behavior. Usually public adress systems are used for the spreading of language and/or music to a larger audience.

Depending whether the project is located outdoor or internal it appears different requirements, in order to ensure the transmission and rendition quality of the sound intensity as well as the speech intelligibility. Differences maintain thereby between the entertainment tecnologie with highly acoustical claims to quality and the functional acoustic irradiation with special needs of facilities, within those people have to be informed and if necessary being evacuated.