Infiltration Air Flow Variance Analysis in Relation to The Reverberation Time and Weighted Global Noise Level Difference
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Abstract
The acoustic method for the experimental determination of the air permeability for buildings manages to overcome the disadvantages of other experimental methods or phenomenological modelling. However, the current degree of development of this method is applicable only to a small number of building types. In this research we adapt this method in order to extend its applicability for different types of buildings. To achieve this, we use an experimental approach, completed by numerical simulations for the formation of a database. More concrete, the purpose of this paper is to analyze the variance of the air infiltration flow (Q) considering the different Window Types (WT) for different Reverberation Time (RT1000Hz) of the receiving room and Global Weighted Noise Level Difference (ΔLA). The statistical model ‘Analysis of Variance (ANOVA)’, offers the possibility to follow the evolution of a phenomenon under different conditions. In this paper, the research objective is to test the hypothesis that Q varies, depending on the four RT1000Hz values for the eight ΔLA values. The article highlights the influence of the two parameters on the infiltrated air flow, as well as the way these parameters must be introduced in a more general model, with wider applicability for different building types.
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