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Buildings 2015, 5(4), 1389-1413; doi:10.3390/buildings5041389

Managing Measurement Uncertainty in Building Acoustics

Construction Technologies Institute, National Research Council of Italy, via Lombardia 49, 20098 San Giuliano Milanese (MI), Italy
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Academic Editor: Umberto Berardi
Received: 30 October 2015 / Revised: 4 December 2015 / Accepted: 14 December 2015 / Published: 18 December 2015
(This article belongs to the Special Issue Selected Papers on Building and Architectural Acoustics from ICSV22)
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Abstract

In general, uncertainties should preferably be determined following the principles laid down in ISO/IEC Guide 98-3, the Guide to the expression of uncertainty in measurement (GUM:1995). According to current knowledge, it seems impossible to formulate these models for the different quantities in building acoustics. Therefore, the concepts of repeatability and reproducibility are necessary to determine the uncertainty of building acoustics measurements. This study shows the uncertainty of field measurements of a lightweight wall, a heavyweight floor, a façade with a single glazing window and a façade with double glazing window that were analyzed by a Round Robin Test (RRT), conducted in a full-scale experimental building at ITC-CNR (Construction Technologies Institute of the National Research Council of Italy). The single number quantities and their uncertainties were evaluated in both narrow and enlarged range and it was shown that including or excluding the low frequencies leads to very significant differences, except in the case of the sound insulation of façades with single glazing window. The results obtained in these RRTs were compared with other results from literature, which confirm the increase of the uncertainty of single number quantities due to the low frequencies extension. Having stated the measurement uncertainty for a single measurement, in building acoustics, it is also very important to deal with sampling for the purposes of classification of buildings or building units. Therefore, this study also shows an application of the sampling included in the Italian Standard on the acoustic classification of building units on a serial type building consisting of 47 building units. It was found that the greatest variability is observed in the façade and it depends on both the great variability of window’s typologies and on workmanship. Finally, it is suggested how to manage the uncertainty in building acoustics, both for one single measurement and a campaign of measurements to determine the acoustic classification of buildings or building units. View Full-Text
Keywords: measurement uncertainty; building acoustics; Round Robin Test (RRT); sampling; acoustic classification measurement uncertainty; building acoustics; Round Robin Test (RRT); sampling; acoustic classification
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Scrosati, C.; Scamoni, F. Managing Measurement Uncertainty in Building Acoustics. Buildings 2015, 5, 1389-1413.

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