CEN/TC 126/WG 4 - Single number ratings of the acoustic performance of buildings and building products

Confirmation from ISO received concerning the CEN leadership (NT/030711)

To establish rounding rules related to single number ratings and single number quantities.

Results from the merging of WIs 00126070 & 072 (see WI 00126072 for details concerning parallel enquiry) (NT/060306)

Defines single-number quantities for airborne sound insulation in buildings and of building elements such as walls, floors, doors and windows. Takes into consideration the different sound level spectra of various noise sources. Gives rules for determining these quantities from the results of measurements carried out in one-third-octave or octave bands in accordance with ISO 140-3 to ISO 140-5, ISO-140-9 and ISO 140-10.

Defines single-number quantities for the impact sound insulation in buildings and of floors. Gives rules for determining these quantities from the results of measurements carried out in one-third-octave bands in accordance with ISO 140-6 and ISO 140-7, and in octave bands in accordance with ISO-140-7 for field measurements only. It also contains quantities for the impact sound reduction of floor coverings.