Contribution
Statistical analysis of the Rw based on the parametrization of an optimized model according to ISO 12354-1
* Presenting author
Abstract:
The EN ISO 12354-1 standard provides a physical model for the sound reduction index R. The results of this model can be used to calculate the weighted sound reduction index for different scenarios, which itself plays an important role in the design of a building element. This raises the question of how well this physical model actually reflects reality. In this work, the physical model is first optimized on the basis of measurement data and numerical methods. The optimized model can then be combined with statistical assumptions to simulate the weighted sound reduction index. These simulations can in turn provide an analysis of the construction in order to decide whether the minimum requirements on sound insulation will be met with a certain probability. For example, it is checked how thick a sand-lime brick wall must be so that the weighted sound reduction index is at least 53 dB with probability 95%.This is relevant as, in the best case scenario, building elements can be optimized with respect to economization of material, which enables a cost-effective construction.