Laboratory characterisation and prediction of structure- borne sound transmission of sanitary installations in heavyweight buildings
Tuesday 2 june, 2015, 14:40 - 15:00
Auditorium 2 (592)
Sound transmission from sanitary installation systems can be a significant source of annoyance in buildings. Typical constructions are pre-wall installations that contain the sanitary equipment such as washbasin, toilet and fresh- and waste-water pipes. Structure-borne sound due to operation of the sanitary equipment is transmitted into the pre-wall and from there through the mounting points into the installation wall (separating wall) and flanking elements that subsequently radiate sound into adjacent rooms. At present the possibilities to predict the sound levels due to sanitary installation systems especially for transient excitation are limited. For this reason it is essential that there are validated approaches to characterise the pre-wall installation in order to be able to incorporate these data in prediction models. For this paper, investigations were carried out on a pre-wall installation that was installed onto a reception plate in order to characterise the structure-borne sound power using EN 15657 and to obtain input data for the EN 12354-5 prediction model. For this purpose, stationary and transient excitations due to operation of sanitary equipment were investigated and the prediction model used to predict the sound transmission in a building-like test rig for comparison with in-situ measurements.
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