2021LST EN ISO 717-2:2021 Acoustics - Rating of sound insulation in buildings and of building elements - Part 2: Impact sound insulation (ISO 717-2:2020)
0000 LST EN ISO 717-2:2013
2001LST EN ISO 717-2:2001 Acoustics - Rating of sound insulation in buildings and of building elements - Part 2: Impact sound insulation (ISO 717-2:1996)