Støjen bliver synlig: Ny standard skal sætte tal på lydniveauet i boliger og inddeler boliger i fire klasser

A draft standard INSTA 122:1997 on sound classification of dwellings is for voting as a common national standard in the Nordic countries (Denmark, Norway, Sweden, Finland, Iceland) and in Estonia. The draft standard specifies a sound classification system with four classes A, B, C and D, where class C is proposed as the future minimum requirements for new dwellings.

The classification system is based on limit values for airborne sound insulation, impact sound pressure level, reverberation time and indoor and outdoor noise levels.