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This calculation is based on the ISO 717-1 and gives the single-number quantities for airborne sound insulation (100-3150Hz) and the extension to frequencies below 100Hz and after 3150Hz (if data available)
Remarks : You can upload files with one column with your data and it detects the frequency range based on the number of data (16 data from 100 to 3150Hz, 18 from 100 to 5000Hz and 21 from 50 to 5000Hz)
Lnw : Soon on
References : ISO 717-1 : Acoustics Rating of sound insulation in buildings and of building elements