NF S31-049-1:1997 Acoustics. Measurement of sound insulation in buildings and of building elements. Part 1 : requirements for laboratory test facilities with suppressed flanking transmission.
2013NF S31-049-1:2013 Acoustics - Laboratory measurement of sound insulation of building elements - Part 1: application rules for specific products
1997NF S31-049-1:1997 Acoustics. Measurement of sound insulation in buildings and of building elements. Part 1 : requirements for laboratory test facilities with suppressed flanking transmission.