A case study on the transmission loss suite in the University of Technology Sydney

Publication Type:
Conference Proceeding
Annual Conference of the Australian Acoustical Society 2021: Making Waves, AAS 2021, 2022, pp. 23-30
Issue Date:
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This paper introduces the newly built sound transmission loss suite at the Centre for Audio, Acoustics and Vibration (CAAV) at the University of Technology Sydney. This report covers vital parameters of the transmission loss suite when testing a typical heavyweight masonry wall, including the background noise, the spatial variations of the sound pressure level, the reverberation time, the absorption coefficients and the transmission loss. The averaged overall background noise level inside the receiving room is 21.3 dB or 15.5 dBA, approaching the test system/equipment's range. The standard deviation of the sound pressure levels in each test room is less than 1.6 dB in one-third-octave bands with centre frequencies between 100 Hz and 5000 Hz. The weighted sound reduction index (Rw) of the test wall is 66 dB with spectrum adaptation terms (C and Ctr) being −1 dB and −6 dB for the A-weighted pink noise spectrum and urban traffic noise spectrum, respectively.
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