Conference_programme: 17: Building acoustics
Lecture: Finnish round robin test on airborne sound insulation
Author(s): Lietzén Jesse, Kylliäinen Mikko
Summary:
The Acoustical Committee of the Finnish Association of Civil Engineers RIL organized a round robin test on airborne sound insulation measurements in 2016. The purpose of the test was to offer an opportunity to compare measurement results and to confirm their validity for operators carrying out sound insulation measurements in Finland. In total, 19 measurement groups from 14 different organizations took part in the test which was carried out in an office building made of concrete. Airborne sound insulation between two office rooms was measured vertically in accordance with the standard ISO 16283-1 and single-number quantities were calculated according to the standard ISO 717-1. The participants determined independently apparent sound reduction indices R’ and standardized level differences DnT in one-third octave bands and calculated single-number quantities R’w and DnT,w as well as spectrum adaptation terms C, Ctr, C50-3150, C50-5000, C100-5000, Ctr,50-3150, Ctr,50-5000 and Ctr,100-5000 from their own results. On the basis of all the results, the weighted apparent sound reduction index R’w was between 57 and 62 dB while the average was 59,9 dB and the standard deviation 1,2 dB. The weighted normalized level difference ranged from 56 to 61 dB while the average was 59,0 dB and the standard deviation 1,2 dB. The deviation of the one-third octave band results was largest in the frequency bands below 100 Hz, which results from the measurement uncertainty of this frequency range. Compared to the standard uncertainties presented in the standard ISO 12999-1 the deviations of the results were mainly larger.
Corresponding author
Name: Mr Jesse Lietzén
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: Finland
