Objective
This intercomparison dealt with laboratory measurements of the sound insulation of double-glazed framed windows. It followed a previous intercomparison of measurements on window panes without frames. The aim of the present project was to determine the measurement precision associated with a measurement procedure better defined than the one in the present ISO Standard 140/3.
Measurements were carried out on two windows that had different kinds of glazing. The measurement guidelines given to the participating laboratories referred to the ISO standard and additionally described in detail the two noise source positions and the window mounting conditions.
RESULTS
Using prescribed noise source positions and window mounting conditions, the reproducibility was found to be different for the two windows that were tested. Large values were obtained for the window with 6-16-6 double glazing, particularly at frequencies corresponding to strong resonances of the system, with single number reproducibilities of 3.3 dB for Rw and 4.5 dB for R traffic. For the other window with 44R-6-8 double glazing, the single number reproducibilities were 1.7 dB for Rw and 2.5 dB for R traffic.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
Belgium
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Participants (15)
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80638 München
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BRAUNSCHWEIG
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M54WT SALFORD,MANCHESTER
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