Speaker
Description
PreNoise® allows users to predict noise levels of service equipment in buildings, based on the standards of EN 12354-5. It provides an early-stage approximation of the planned object and allows users to quickly select suitable systems with the required noise protection level in the planning phase and helps to assess the impact of changes to the building's structure. PreNoise® is developed by the Fraunhofer-Institute for Building Physics IBP in Stuttgart. The method has been validated against laboratory measurements of drainage systems conducted according to EN 14366-1. For the tested configurations in massive constructions, typical deviations between predicted and measured noise levels are within ± 1 - 3 dB . The current implementation covers massive constructions, and extensions to lightweight and timber buildings are planned. The main practical constraint of this approach is the availability of source data, which is usually derived from laboratory measurements. For drainage systems, IBP additionally provides the source database generated by numerical simulations, while for other technical sources the source characteristics must be measured (e.g. EN 15657).PreNoise® is available as a web application with a free version (limited functionality) and an extended R&D-version (offline).The current web application enables the prediction of wastewater systems for both the source room and the receiving room directly behind the installation wall. Within certain limits, users can adjust the room size as well as the thickness and material of the installation wall. The full version offers extended features, including diagonal transmission and multiple sources.