Abstract
The Norwegian Standard for sound classification of buildings, NS 8175, was revised in 2019, with the one significant change being that low frequency spectrum adaption terms were made mandatory for dwellings. Almost six years later, the new version of the standard is yet to be adopted into the legislation by the Norwegian Building Authority. The main reasons behind this delay are that the inclusion of low frequencies will increase the already high costs of building, and that it might also pose a threat to the traditional Norwegian building style. Nevertheless, the authorities are now indicating that the standard will be adopted within 2026. In this paper, the change will be discussed from a test institute’s point of view, looking at issues, opportunities and whether the building industry has spent these six years wisely.