Contribution
Building Services Equipment – From Source Characterization and Prediction to Validation in Buildings
* Presenting author
Abstract:
In a joint development project between Viessmann Climate Solutions SE and Rosenheim Technical University, the structure-borne sound properties of a Viessmann heat pump indoor unit and ventilation system were investigated. The source characterization procedure according to DIN EN 15657 and the prediction method according to DIN EN ISO 12354-5 where applied and validation measurements were performed in timber frame buildings.A notable impact of the selected operating points of the sources on the strength and the frequency characteristics of the structure-borne sound power was found. However, in building acoustics measurements, the investigated sources show low installation noise levels, which were well below the requirements of DIN 4109-1 and other relevant regulations/recommendations in Germany.For prediction of the airborne and structure-borne sound transmission in buildings, transmission functions and normalized airborne sound level differences were measured in various buildings. The predictions were calculated using different transmission situations and operating conditions. In comparison with validation measurements, an overview of frequency-dependent and single-number values for noise from building services equipment is provided in the paper.