Conference_programme: 17.6 - Predicting vibration / impact / structure-borne sound in buildings
Lecture: Sanitary Installations in Buildings – Noise Contribution Analysis with Sensor Arrays and Laser Scanning Vibrometry
Author(s): Wolff Oliver, Förster Joachim
Summary:
Noises from sanitary installations in buildings are often considered annoying. A reason might be, that sound cannot be judged by its measured sound pressure level only. Instead, sound is a flow of information that travels from an activated system towards a listening person with individual feelings and personal expectations. As such, noises created by the sanitary systems from neighbors might be perceived unnecessary or annoying even in cases of low sound pressure level. \n\nMost of the sounds in building acoustics can be treated by theoretical models which are described in acoustical standards. Especially the standard EN 12354 allows the theoretical calculation of sound pressure levels in buildings. However, sanitary installations are not well represented in this standard as a fully validated acoustical model to predict sanitary installation noises in buildings does not exist so far. \n\nSound generated by sanitary systems are difficult to model because the sound is created by a complex interaction of various acoustically relevant elements such as pipes, ceramics, cisterns, studs, plasterboards, etc. and their direct or indirect connection to the building. In addition, contributions from structure borne and airborne sound are intermixed with each other and even worse, the interaction of the participating elements is time dependent. \n\nThe presented study shows the analyses and visualization of various sound paths and their contributions generated by a sanitary installation. A special technique has been used combining multichannel sensor arrays with laser scanning vibrometry. The study analyses the sound paths for light weight constructions and massive constructions. \n\nThe standard EN 14366 is often used to judge sanitary noises. However, it can only be applied for straight pipes and cannot fully predict the sanitary noises in real buildings. Based on the presented results opportunities are shown how to improve the applicability of the current standard EN14366.
Corresponding author
Name: Dr Oliver Wolff
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: Switzerland
