Experiences with source characterization methods within and beyond the scope of EN 15657

Abstract

Prediction of machinery noise in buildings requires knowledge about the airborne sound radiation and the structure-borne sound excitation from the source of interest. Laboratory methods to determine the airborne sound power of sources are well established since many years. However, standard methods for the characterization of structure-borne sound from building service equipment were first described in EN 15657-1:2009 which was then superseded by EN 15657:2017. In recent years the test methods described in this standard were applied in several research and development projects in the laboratory for sound measurement (LaSM) at Rosenheim Technical University of Applied Sciences. For this purpose the experimental equipment and the facilities of the laboratory were expanded which involves a variable reception plate test rig that was built in 2017. This paper describes the experience with test methods within and beyond the scope of the EN 15657:2017 using the available laboratory resources.