Noise Abatement Ordinance
(NAO)

¹ For rooms in in­dus­tri­al build­ings (Art. 2 para. 6 let. b) ly­ing in areas of sens­it­iv­ity levels I, II or III, the plan­ning and im­pact thresholds shall be in­creased by 5 dB(A).

² Para­graph 1 does not ap­ply to rooms in schools, in­sti­tu­tions and homes. It ap­plies to ho­tels and gues­t­houses only if these can be ad­equately vent­il­ated when the win­dows are closed.