Chapter I: General provisions

The exposure limit values and exposure values triggering preventive action are set out in the following table: EXPOSURE VALUES EXPOSURE LEVEL 1° Exposure limit values Daily noise exposure level of 87 dB (A) or peak sound pressure level of 140 dB (C) 2° Upper exposure values triggering the preventive action provided for in article R. 4434-3, in 2° of article R. 4434-7, and in article R. 4435-1 Daily noise exposure…

For the application of the exposure limit values defined in 1° of Article R. 4431-2, the determination of the worker’s actual exposure to noise takes into account the attenuation provided by the individual hearing protectors worn by the worker. The exposure values defined in 2° and 3° of the same article do not take into account the effect of the use of these protectors.

In circumstances duly justified to the Labour Inspectorate monitoring officer and for activities characterised by a significant variation in daily noise exposure from one working day to the next, the weekly noise exposure level may be used instead of the daily exposure level to assess the noise levels to which workers are exposed, for the purposes of applying the exposure limit values and the values triggering preventive action. This substitution…