Law
In Finnish land and building law state the set of obligatory building regulations. The technical regulations about noise prevention are obligatory for all dwelling houses.

Comfort
Comfort concept associates with sleeping, living, working and relaxing and also with other everyday functions. To fulfill the comfort requirements the spaces need to be quieter than requested in health regulations.

Source: Soundproofing in the buildings, Department of Environment 2003.

www.sfs.fi - SFS 5907 Acoustic classification of buildings