Noise is the one of the most exposured physical effect in working areas in our country and world. Noise effects either on ears and circulating systems physically or phychological effects on employees which result lack of concentrations.
According to the last regulation that published by Ministry of Labor and Social Security on official paper in 2013, the noise exposure level must be in the range of 80 and 85 dB(A) in industrial areas. The usage of personal protective equipments are obligated by Ministry of Labor and Social Security since noise exposure level above 85 dB(A). In case of non-compliance the criminal sanctions can be applied.
Extended Regulation: http://www.resmigazete.gov.tr/eskiler/2013/07/20130728-11.htm