2021DIN EN ISO 12999-1:2021 Acoustics - Determination and application of measurement uncertainties in building acoustics - Part 1: Sound insulation (ISO 12999-1:2020); German version EN ISO 12999-1:2020
2014DIN EN ISO 12999-1:2014 Acoustics - Determination and application of measurement uncertainties in building acoustics - Part 1: Sound insulation (ISO 12999-1:2014); German version EN ISO 12999-1:2014