The topic of noise attenuation through a fa?ade with an open window has received little attention, especially within Australia. The objective of this study was to obtain field measured noise reduction data for facades with open windows at Queensland style residences, specifically those with timber, brick veneer and double brick facade constructions. This investigation targeted the Leq and Lmax noise descriptors, using road traffic noise and car door slams as the noise sources. To investigate this topic, a simultaneous multiple microphone method was developed using adapted testing procedures outlined in both AS 2702 "Acoustics - Methods for the measurement of road traffic noise" and ISO 140-5 "Acoustics - Measurement of sound insulation in buildings and of building ele-ments".This study has obtained noise reduction results which can be compared to the 5 dB(A) open window attenuation correction presented by the Queensland Government's "Planning for Noise Control Guideline" (PNCG) and the Brisbane City Councils "Noise Impact Assessment Planning Scheme Policy" (NIAPSP). The results of this investigation were also compared with internal noise prediction methods currently available to be used by acoustic consultants.
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