In the field measurement UNI EN ISO 140 application for large volume open-space rooms

This work has the aim of evaluate the applicability of set of UNI EN ISO 140 standards about in the field measurement methodologies of building acoustic insulation, in case of large volume rooms. The object of the study is a modern conception tertiary sector building (with advanced engineering and architectural solutions), located in the urban area of Milano. During the in the field measurement of passive building acoustic requirements the issue of large open-space measurements came out; this case is not covered explicitly by the UNI EN ISO 140 standards. In this regard, from some hints in the 140-14 standard it was possible to identify, through the analysis of the distribution of sound levels within the open-space, smaller spaces to be used as a minimum unit to survey (said "virtual volumes"). The measures, performed on all seven floors of the building, focused on the airborne insulation between different units and on the impact sound insulation of floors. The collected data, statistically processed, allowed to draw some considerations concerning the most appropriate operating methodology for performing the measurements on these types of spaces.