DataKustik GmbH, based in Gilching near Munich, develops software for the calculation, evaluation and presentation of noise immission and sound distribution. Next to the software development, DataKustik GmbH is extensively researching and consulting in these fields. DataKustik GmbH is a modern software and service company with worldwide business connections. The sound propagation software CadnaA (outdoor noise), CadnaR (indoor sound) and CadnaB (building acoustics) are being used by road authorities, railway administrations, airport operators and industrial companies in more than 60 countries. In order to ensure the high standard of our software and consulting operation in the future, we are continuously engaged in the development of guidelines and standards and in the screening of international methods of noise calculation.