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Noise Abatement Ordinance
(NAO)

English is not an official language of the Swiss Confederation. This translation is provided for information purposes only and has no legal force.

of 15 December 1986 (Status as of 1 July 2021)

Art. 39 Point of determination

1 For build­ings, noise ex­pos­ure levels shall be de­term­ined at the centre of open win­dows in rooms sens­it­ive to noise. Noise ex­pos­ure levels due to air­craft may also be de­term­ined in the vi­cin­ity of the build­ing.38

2 In the non-de­veloped sec­tor of zones with high­er noise abate­ment re­quire­ments, noise ex­pos­ure levels shall be meas­ured 1.5 m above the ground.

3 In build­ing zones that have not yet been de­veloped, noise ex­pos­ure levels shall be meas­ured at points where the build­ing and plan­ning le­gis­la­tion al­lows the build­ing of rooms sens­it­ive to noise.

38 The cor­rec­tion of 7 May 2019 con­cerns the French text only (AS 2019 1337).