The Probability Density Functions and The Uncertainty of the EN12354 Prediction Method
The probability density functions (PDFs) of each of the terms described in the prediction method of EN12354-1 and ISO10848-1 were examined in this study using experimental data and Monte Carlo simulations. The results of this study will provide a necessary insight for the calculation of the uncertainty of the apparent sound reduction index. A knowledge of the PDFs is particularly needed if the prediction method is to be applied to lightweight building constructions which may exhibit larger variances in experimental measurements than heavy, monolithic constructions. Based on the results of this study, it is expected that the uncertainty of the logarithmic terms of the prediction method may be calculated using the guidelines of the ISO Guide to the Expression of Uncertainty in Measurement. However, further analysis is needed to clarify the PDFs of measurements made in a reverberant room before definitive conclusions about the use of the GUM method can be made.