EN ISO 11690-3:1998 Acoustics - Recommended Practice for the Design of Low-Noise Workplaces Containing Machinery - Part 3: Sound Propagation and Noise Prediction in Workrooms ISO/TR 11690-3:1997
1998EN ISO 11690-3:1998 Acoustics - Recommended Practice for the Design of Low-Noise Workplaces Containing Machinery - Part 3: Sound Propagation and Noise Prediction in Workrooms ISO/TR 11690-3:1997