| Zugriffsnummer | 18051 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Uncertainties in building acoustics |
| Autor(in); Institution |
Wittstock, Volker; 1.7, Angewandte Akustik, PTB-Braunschweig
|
| Quelle/Jahr | Forum Acusticum Budapest, 29 Aug - 2 Sep 2005: Proceedings : [Acoustics: science and technology for knowledge based society and healthy environment]:(2005), 2217 - 2222 |
| Availability | [CD-ROM] ; file name: 378-0.pdf |
| Herausgeber(in) |
Augusztinovicz, Fülöp
|
| ISBN | 963-8241-68-3 |
| Verlag | Budapest: OPAKFI |
| Konferenzangaben | Congress Forum Acusticum Budapest, Budapest, 29, August - 2, September, 2005, Hungary |
| Zusammenfassung | The uncertainties associated with the airborne sound insulation are investigated. Starting point is an analysis of the different influence factors which finally results in the identification of a total of 16 uncertainty contributions. The order of magnitude of some uncertainty contributions is estimated on the basis of the data available. In addition to intercomparison results available from literature, the estimate also covers internal PTB data. The individual uncertainty contributions are assigned to the precision measures so far used in building acoustics, i.e. repeatability and reproducibility, according to ISO 140-2 which allows the existing intercomparison results to be quantitatively compared with the values from ISO 140-2. It turns out that the values stated in ISO 140-2 are usually lower than the actually occurring uncertainties. In conclusion, the consequences resulting from the uncertainties for the safety margin and re-measurements are shown. It is furthermore investigated in detail, how many different specimens of a building element must be measured in how many different test facilities to achieve that the uncertainty assigned to the mean value from these measurements does not exceed specified upper limits. In addition, the propagation of the uncertainties from the values of the building element catalogue up to the prognosis value is calculated on the basis of an example. It results that the uncertainty of the predicted value is still lower than, or maximally equal to, the individual uncertainties of the building elements involved. |
