Permissible exposure levels of noise in the workplace
The permitted levels of an employee’s exposure to noise in the workplace shall not exceed the limit values described in the Table 1.
In every point of time when employees are at work, the maximum sound pressure level does not exceed 115 dBA.
The permissible sound pressure limits at different work positions are regulated in the Table 2.
In every point of time when employees are at work, the maximum sound pressure level does not exceed 115 dBA.
Personal protective equipment: At work sites, unless there are solutions to reducing the sound pressure level by less than 85 dBA, measures to protect employee’s hearing should be applied. Equipping employees at work with hearing protections must conform to requirements set out in the Table 3.
If employees expose to different sound pressure levels in a work shift, the overall noise exposure level does not exceed 1 and is calculated according to the following formula:
D = [C1/T1 + C2/T2 + … + Cn/Tn] ≤ 1
Where
D refers to the level of exposure to noise within a working day.
C1, C2 ,…. Cn refers to the 1st, 2nd,… nth actual exposure time equivalent to the actual noise level measured within that time.
T1, T2 …. Tn refers to the period of time during which exposure to noise is permitted, equivalent to the actual noise level measured within C1, C2, ….Cn.
Facilities having their employees exposing to noise must regularly carry out work noise measurements at least once a year and in compliance with regulations laid down in the Labor Code, and the Law on Occupational Safety and Hygiene.
Employers must provide all personal protective equipment necessary for employees that ensure conformity with work environment requirements.
If noise emitted in the workplace exceeds the permitted limit, employers must promptly take actions to improve work conditions and protect employee’s health.
This regulation shall replace the standards for noise set out in the occupational hygiene standards issued together with the Decision No. 3733/2002/QD-BYT dated 10/10/2002 of the Minister of Health.
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(Nguồn tin: vnniosh.vn)
