Das Projekt "Silencing planning for auxillary ventilation and dedusting systems" wird vom Umweltbundesamt gefördert und von DMT-Gesellschaft für Forschung und Prüfung mbH, Institut für Förderung und Transport durchgeführt. Objective: The aim of the project is to develop a procedure for predicting noise nuisances originating from auxiliary ventilation and dedusting plant components and to make it available for industrial use. General Information: The prediction procedure is based on the acoustic parameters of the components concerned, including: - sound power level radiated from ventilation ducts and fan casings - attenuation values of sound absorbers, pipelines and ducts - sound radiation from suction and blow-out devices - duct attenuation values and sound power levels radiated from deduster casings. The procedure can lead to considerable improvements by taking account of health-related questions (hearing damage) in plant design, construction and operation. Computation procedures based on geometric acoustics are to be used to predict noise nuisance distribution in the vicinity of auxiliary ventilation and dedusting plant. The necessary environmental acoustic parameters (e.g. degree of absorption by walls, floors and roofs) are to be determined in, for example, the Tremonia experimental gallery. As regards the acoustic parameters, i.e. sound power level and attenuation values, the values applied have been determined with reference to relatively new standardised procedures (ISO, DIN).