AS 5218:2018 pdf free.Acoustic performance of windows and doors—Methods of test. 3.6 Weighted sound reduction index (Re.) and spectrum adaptation terms (C, Cir) The single-number quantity resulting from a comparison of the values of measured sound reduction index (R) obtained using Equation 3.5 with reference values for one-third octave bands within the range 100 Hz to 3150 Hz, calculated in...
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