NF S31-600-3*NF EN ISO 11690-3:1999 Acoustics. Recommended practice for the design of low-noise workplaces containing machinery. Part 3 : sound propagation and noise prediction in workrooms.
1999NF S31-600-3*NF EN ISO 11690-3:1999 Acoustics. Recommended practice for the design of low-noise workplaces containing machinery. Part 3 : sound propagation and noise prediction in workrooms.