Determination of the Uncertainty of Predicted Values in Building Acoustics

摘要

An Excel spreadsheet has been developed for the calculation of the uncertainty of the predicted airborne sound insulation. It was verified for solid and light-weight constructions. The uncertainties of the predicted values assume reasonable values between 1.5 and 2.7 dB for the 50 considered cases. Deviations between measurements and predictions can be well explained by including the uncertainties. This indicates that the uncertainty of the prediction method of 0.8 dB is adequate. The spreadsheet allows for a parameter variation showing which of the input uncertainties are critical with respect to the uncertainty of the prediction result. The Excel spreadsheet can be obtained at www.ptb.de/enl2354.